c# & Java on Tips, Hibernate ORM, JSF(Java Server Faces), Primefaces, WPF, Windows form

Check prime number (Best Method)

2013-09-15T08:21:00.000-07:00

boolean isPrime(int number) {
//check if n is a multiple of 2
if (number%2 == 0) return false;
//if not, then just check the odds
for(int i=3;i*i<=number;i+=2) {
if(number%i == 0)
return false;
}
return true;
}

Templating in jsf 2.0 simple example

2013-04-17T06:06:00.001-07:00

This is the template code: template.xhtml and this file is located in WEB-INF/template/usertemplate

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml"

xmlns:h="http://java.sun.com/jsf/html"

xmlns:f="http://java.sun.com/jsf/core"

xmlns:ui="http://java.sun.com/jsf/facelets">

<h:head>

<title>

<ui:insert name="pageTitle">Page Title</ui:insert>

</title>

body {

font-family: Verdana, Arial, Helvetica, sans-serif;

font-size: 14px;

}

#header {

font-family: Verdana, Arial, Helvetica, sans-serif;

font-size: 18px;

}

#content{

width:80%;

margin:0 auto;

}

#footer {

font-family: Verdana, Arial, Helvetica, sans-serif;

font-size: 12px;

text-align: center;

color: #8E969D;

border:1px solid black;

width:80%;

margin:0 auto;

background-color: gray;

}

#abc{

background-color: black;

opacity:0.4;

filter:alpha(opacity=40)

}

</style>

</h:head>

<h:body>

<ui:insert name="header">

</ui:insert>

</div>

<ui:insert name="content">

</ui:insert>

</div>

<ui:insert name="footer">

</ui:insert>

</div>

</h:body>

</html>

this is one facelet code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml"

xmlns:h="http://java.sun.com/jsf/html"

xmlns:f="http://java.sun.com/jsf/core"

xmlns:ui="http://java.sun.com/jsf/facelets"

xmlns:p="http://primefaces.org/ui">

<ui:composition template="/WEB-INF/templates/userTemplate/template.xhtml">

<ui:define name="content">

<h:form id="addBrandForm" style="border:2px solid #CCC; padding:3px;" onmouseover="style.border='2px solid #0276FD'" onmouseout="style.border='2px solid #CCC'">

<h:outputLabel value="Facelet" />

</h:form>

</ui:define>

</ui:composition>

</html>

Hibernate Example (Retrieve data from database)

2013-03-01T06:25:00.003-08:00

package com.hibernate.example;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class TestEmployee {

public static void main(String[] args) {
AnnotationConfiguration config = new AnnotationConfiguration();
config.configure();
config.addAnnotatedClass(Employee.class);

new SchemaExport(config).create(true,true);

Employee emp1 = new Employee();
emp1.setEmpname("Umair");
Employee emp2 = new Employee();
emp2.setEmpname("Baig");

SessionFactory factory = config.buildSessionFactory();
Session session = factory.openSession();

session.beginTransaction();
session.save(emp1);
session.save(emp2);

session.getTransaction().commit();
Query query = session.createQuery("From Employee");
List emp = query.list();

for(int i=0;i<emp.size();i++){
Employee empUser = (Employee) emp.get(i);
System.out.println("Employee Name : "+empUser.getEmpname()+"\n");
}
session.close();
}
}

HIbernate Example (Java Application)

2013-03-01T06:16:00.000-08:00

package com.hibernate.example;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class Employee {
private int empid;
private String empname;

@Id
@GeneratedValue
public int getEmpid() {
return empid;
}
public void setEmpid(int empid) {
this.empid = empid;
}
public String getEmpname() {
return empname;
}
public void setEmpname(String empname) {
this.empname = empname;
}

}

package com.hibernate.example;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class TestEmployee {

public static void main(String[] args) {
AnnotationConfiguration config = new AnnotationConfiguration();
config.configure();
config.addAnnotatedClass(Employee.class);

new SchemaExport(config).create(true,true);

Employee emp1 = new Employee();
emp1.setEmpname("Umair");
Employee emp2 = new Employee();
emp2.setEmpname("Baig");

SessionFactory factory = config.buildSessionFactory();
Session session = factory.openSession();

session.beginTransaction();
session.save(emp1);
session.save(emp2);

session.getTransaction().commit();
session.close();

}

}

Inventory Management & Point of Sale v 2.0

2013-01-27T06:32:00.001-08:00

Print Document, Data Grid View in c# windows form application

2013-01-21T03:58:00.000-08:00

Download source code: Download Here
C# Code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Forms;

namespace PrintDocumnentTutorial
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();

dataGridView1.Columns.Add("SrNO", "Sr No.");
dataGridView1.Columns.Add("Empname", "Employee Name");

}

private void button2_Click(object sender, EventArgs e)
{
dataGridView1.AutoGenerateColumns = false;
dataGridView1.AllowUserToAddRows = false;

dataGridView1.Rows.Clear();

dataGridView1.Rows.Add();
dataGridView1.Rows[0].Cells[0].Value = 1;
dataGridView1.Rows[0].Cells[1].Value = "Umair";

}

private void button1_Click(object sender, EventArgs e)
{
if (dataGridView1.Rows.Count == 0)
{
System.Windows.MessageBox.Show("Data is Empty");
}
else
{
printDocument1.Print();
}
}

private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
Font fh = new System.Drawing.Font(new FontFamily("Arial"), 12);
Bitmap dataGridViewImage = new Bitmap(this.dataGridView1.Width, this.dataGridView1.Height);
dataGridView1.DrawToBitmap(dataGridViewImage, new Rectangle(0, 15, this.dataGridView1.Width, this.dataGridView1.Height));
e.Graphics.DrawImage(dataGridViewImage, 0, 15);

e.Graphics.DrawString("add1", fh, Brushes.Black, new System.Drawing.Point(0, (this.dataGridView1.Height + 200)));
e.Graphics.DrawString("add2", fh, Brushes.Black, new System.Drawing.Point(0, (this.dataGridView1.Height + 215)));
e.Graphics.DrawString("add3", fh, Brushes.Black, new System.Drawing.Point(0, (this.dataGridView1.Height + 230)));

}

}
}

Filing in C# WPF Application

2013-01-17T08:08:00.003-08:00

Download Source Code: FileCode
Xaml :

<Window x:Class="FileHandling.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<TextBox Height="23" HorizontalAlignment="Left" Margin="190,106,0,0" Name="filedatatxt" VerticalAlignment="Top" Width="120" />
<Button Content="Write Text" Height="23" HorizontalAlignment="Left" Margin="235,135,0,0" Name="writeBtn" VerticalAlignment="Top" Width="75" Click="writeBtn_Click" />
</Grid>
</Window>

C#:

using System;

using System.IO;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

namespace FileHandling

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

// Reading from file which is located in debug folder

// Begins

string[] lines = File.ReadAllLines("Highscore.txt");

foreach (string tempLines in lines) {

MessageBox.Show(tempLines);

}

// Ends

}

private void writeBtn_Click(object sender, RoutedEventArgs e)

{

StreamWriter writeFile = new StreamWriter("Highscore.txt",true);

writeFile.WriteLine(filedatatxt.Text);

writeFile.Close();

}

Blur Effect in C# WPF Xaml

2013-01-17T08:06:00.001-08:00

XAML Code :

<Window x:Class="blurEffects.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Button Height="40" Width="100" Content="Blur effect with radius 5">
<Button.Effect>
<BlurEffect Radius="5"></BlurEffect>
</Button.Effect>
</Button>
</Grid>
</Window>

Cool Bounce Animation in C# and Xaml WPF

2013-01-17T08:03:00.000-08:00

Source Code : Download here
Video Tutorial :

Cool User Interface Designing With C# Animations and XAML Code

2013-01-17T07:57:00.000-08:00

Source Code : Download Here
Screen Shot :

XAML Code :

<Window x:Class="WpfApplication1.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="MainWindow" Height="450" Width="750">

<Grid>

<Grid.Background>

</LinearGradientBrush>

</Grid.Background>

<Image.Effect>

</Image.Effect>

</Image>

<Image.Effect>

</Image.Effect>

</Image>

<Image.Effect>

</Image.Effect>

</Image>

<Image.Effect>

</Image.Effect>

</Image>

<Image.Effect>

</Image.Effect>

</Image>

<Image.Effect>

</Image.Effect>

</Image>

<Image.Effect>

</Image.Effect>

</Image>

<Image.Effect>

</Image.Effect>

</Image>

<Ellipse.Stroke>

</LinearGradientBrush>

</Ellipse.Stroke>

<Ellipse.Effect x:Uid="Effects">

</Ellipse.Effect>

</Ellipse>

<Label.Foreground>

</LinearGradientBrush>

</Label.Foreground>

<Label.Effect>

</Label.Effect>

</Label>

</Grid>

</Window>

C# Code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Effects;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}

private void LeftLabel_MouseEnter(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
BitmapImage imgIcon = new BitmapImage(new Uri("ButtonIcons/Display.png", UriKind.Relative));
ButtonIcons.Source = imgIcon;
}

private void LeftLabel_MouseLeave(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
}

private void CenterLabel_MouseEnter(object sender, MouseEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = 1;
img.From = 0;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
BitmapImage imgIcon = new BitmapImage(new Uri("ButtonIcons/inventoryManage.png", UriKind.Relative));
ButtonIcons.Source = imgIcon;

}

private void CenterLabel_MouseLeave(object sender, MouseEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
}

private void RightLabel_MouseEnter(object sender, MouseEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = 1;
img.From = 0;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
BitmapImage imgIcon = new BitmapImage(new Uri("ButtonIcons/NewSale.png", UriKind.Relative));
ButtonIcons.Source = imgIcon;
}

private void RightLabel_MouseLeave(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
}

private void LeftLabel_MouseDown(object sender, MouseButtonEventArgs e)
{
LeftImg.Effect = null;
}

private void LeftLabel_MouseUp(object sender, MouseButtonEventArgs e)
{
DropShadowEffect effectsImg = new DropShadowEffect();
effectsImg.BlurRadius = 15;
effectsImg.Direction = 270;
effectsImg.ShadowDepth = 7;
LeftImg.Effect = effectsImg;
}

private void CenterLabel_MouseDown(object sender, MouseButtonEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 0.7;

CenterImg.BeginAnimation(OpacityProperty, img);
CenterLabel.BeginAnimation(OpacityProperty, img);
image2.BeginAnimation(OpacityProperty, img);

RightImg.BeginAnimation(OpacityProperty, img);
RightLabel.BeginAnimation(OpacityProperty, img);
image3.BeginAnimation(OpacityProperty, img);

LeftImg.BeginAnimation(OpacityProperty, img);
LeftLabel.BeginAnimation(OpacityProperty, img);
image1.BeginAnimation(OpacityProperty, img);

//Hide Items

CenterImg.Visibility = System.Windows.Visibility.Hidden;
CenterLabel.Visibility = System.Windows.Visibility.Hidden;
image2.Visibility = System.Windows.Visibility.Hidden;

RightImg.Visibility = System.Windows.Visibility.Hidden;
RightLabel.Visibility = System.Windows.Visibility.Hidden;
image3.Visibility = System.Windows.Visibility.Hidden;

LeftImg.Visibility = System.Windows.Visibility.Hidden;
LeftLabel.Visibility = System.Windows.Visibility.Hidden;
image1.Visibility = System.Windows.Visibility.Hidden;
//ends

DoubleAnimation img1 = new DoubleAnimation();
img1.To = 0.7;
img1.From = 0;

CenterImg1.BeginAnimation(OpacityProperty, img1);
CenterLabel1.BeginAnimation(OpacityProperty, img1);
image21.BeginAnimation(OpacityProperty, img1);

RightImg1.BeginAnimation(OpacityProperty, img1);
RightLabel1.BeginAnimation(OpacityProperty, img1);
image31.BeginAnimation(OpacityProperty, img1);

ExtremeRightImg.BeginAnimation(OpacityProperty, img1);
ExtremeRightLabel.BeginAnimation(OpacityProperty, img1);
image32.BeginAnimation(OpacityProperty, img1);

Extremeimage1.BeginAnimation(OpacityProperty, img1);
ExtremeLeftImg.BeginAnimation(OpacityProperty, img1);
ExtremeLeftLabel.BeginAnimation(OpacityProperty, img1);

LeftImg1.BeginAnimation(OpacityProperty, img1);
LeftLabel1.BeginAnimation(OpacityProperty, img1);
image112.BeginAnimation(OpacityProperty, img1);


//Visible Items

CenterImg1.Visibility = System.Windows.Visibility.Visible;
CenterLabel1.Visibility = System.Windows.Visibility.Visible;
image21.Visibility = System.Windows.Visibility.Visible;

RightImg1.Visibility = System.Windows.Visibility.Visible;
RightLabel1.Visibility = System.Windows.Visibility.Visible;
image31.Visibility = System.Windows.Visibility.Visible;

image32.Visibility = System.Windows.Visibility.Visible;
ExtremeRightImg.Visibility = System.Windows.Visibility.Visible;
ExtremeRightLabel.Visibility = System.Windows.Visibility.Visible;

Extremeimage1.Visibility = System.Windows.Visibility.Visible;
ExtremeLeftImg.Visibility = System.Windows.Visibility.Visible;
ExtremeLeftLabel.Visibility = System.Windows.Visibility.Visible;

LeftImg1.Visibility = System.Windows.Visibility.Visible;
LeftLabel1.Visibility = System.Windows.Visibility.Visible;
image112.Visibility = System.Windows.Visibility.Visible;

//Ends

}

private void CenterLabel_MouseUp(object sender, MouseButtonEventArgs e)
{

DropShadowEffect effectsImg = new DropShadowEffect();
effectsImg.BlurRadius = 15;
effectsImg.Direction = 270;
effectsImg.ShadowDepth = 7;
CenterImg.Effect = effectsImg;
}

private void RightLabel_MouseDown(object sender, MouseButtonEventArgs e)
{
RightImg.Effect = null;
}

private void RightLabel_MouseUp(object sender, MouseButtonEventArgs e)
{

DropShadowEffect effectsImg = new DropShadowEffect();
effectsImg.BlurRadius = 15;
effectsImg.Direction = 270;
effectsImg.ShadowDepth = 7;
RightImg.Effect = effectsImg;
}

private void CenterLabel1_MouseEnter(object sender, MouseEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = 1;
img.From = 0;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
BitmapImage imgIcon = new BitmapImage(new Uri("ButtonIcons/NewSale.png", UriKind.Relative));
ButtonIcons.Source = imgIcon;
}

private void CenterLabel1_MouseLeave(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
}

private void CenterLabel1_MouseDown(object sender, MouseButtonEventArgs e)
{
CenterImg1.Effect = null;
}

private void CenterLabel1_MouseUp(object sender, MouseButtonEventArgs e)
{
DropShadowEffect effectsImg = new DropShadowEffect();
effectsImg.BlurRadius = 15;
effectsImg.Direction = 270;
effectsImg.ShadowDepth = 7;
CenterImg1.Effect = effectsImg;

}

private void RightLabel1_MouseEnter(object sender, MouseEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = 1;
img.From = 0;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
BitmapImage imgIcon = new BitmapImage(new Uri("ButtonIcons/Delete.png", UriKind.Relative));
ButtonIcons.Source = imgIcon;
}

private void RightLabel1_MouseLeave(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
}

private void RightLabel1_MouseDown(object sender, MouseButtonEventArgs e)
{
RightImg1.Effect = null;
}

private void RightLabel1_MouseUp(object sender, MouseButtonEventArgs e)
{

DropShadowEffect effectsImg = new DropShadowEffect();
effectsImg.BlurRadius = 15;
effectsImg.Direction = 270;
effectsImg.ShadowDepth = 7;
RightImg1.Effect = effectsImg;
}

private void ExtremeLeftLabel_MouseEnter(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 1;
img.From = 0;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
BitmapImage imgIcon = new BitmapImage(new Uri("ButtonIcons/Update.png", UriKind.Relative));
ButtonIcons.Source = imgIcon;
}

private void ExtremeLeftLabel_MouseLeave(object sender, MouseEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
}

private void ExtremeLeftLabel_MouseDown(object sender, MouseButtonEventArgs e)
{
ExtremeLeftImg.Effect = null;
}

private void ExtremeLeftLabel_MouseUp(object sender, MouseButtonEventArgs e)
{

DropShadowEffect effectsImg = new DropShadowEffect();
effectsImg.BlurRadius = 15;
effectsImg.Direction = 270;
effectsImg.ShadowDepth = 7;
ExtremeLeftImg.Effect = effectsImg;
}

private void LeftLabel1_MouseEnter(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 1;
img.From = 0;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
BitmapImage imgIcon = new BitmapImage(new Uri("ButtonIcons/ViewSale.png", UriKind.Relative));
ButtonIcons.Source = imgIcon;
}

private void LeftLabel1_MouseLeave(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
}

private void LeftLabel1_MouseDown(object sender, MouseButtonEventArgs e)
{
LeftImg1.Effect = null;
}

private void LeftLabel1_MouseUp(object sender, MouseButtonEventArgs e)
{
DropShadowEffect effectsImg = new DropShadowEffect();
effectsImg.BlurRadius = 15;
effectsImg.Direction = 270;
effectsImg.ShadowDepth = 7;
LeftImg1.Effect = effectsImg;

}

private void ExtremeRightLabel_MouseEnter(object sender, MouseEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = 1;
img.From = 0;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
BitmapImage imgIcon = new BitmapImage(new Uri("ButtonIcons/BackIcon.png", UriKind.Relative));
ButtonIcons.Source = imgIcon;
}

private void ExtremeRightLabel_MouseLeave(object sender, MouseEventArgs e)
{
DoubleAnimation img = new DoubleAnimation();
img.To = 0;
img.From = 1;
ButtonIcons.BeginAnimation(OpacityProperty, img);
ellipse1.BeginAnimation(OpacityProperty, img);
}

private void ExtremeRightLabel_MouseDown(object sender, MouseButtonEventArgs e)
{

DoubleAnimation img = new DoubleAnimation();
img.To = .7;
img.From = 0;

CenterImg.BeginAnimation(OpacityProperty, img);
CenterLabel.BeginAnimation(OpacityProperty, img);
image2.BeginAnimation(OpacityProperty, img);

RightImg.BeginAnimation(OpacityProperty, img);
RightLabel.BeginAnimation(OpacityProperty, img);
image3.BeginAnimation(OpacityProperty, img);

LeftImg.BeginAnimation(OpacityProperty, img);
LeftLabel.BeginAnimation(OpacityProperty, img);
image1.BeginAnimation(OpacityProperty, img);
//Visible Items

CenterImg.Visibility = System.Windows.Visibility.Visible;
CenterLabel.Visibility = System.Windows.Visibility.Visible;
image2.Visibility = System.Windows.Visibility.Visible;

RightImg.Visibility = System.Windows.Visibility.Visible;
RightLabel.Visibility = System.Windows.Visibility.Visible;
image3.Visibility = System.Windows.Visibility.Visible;

LeftImg.Visibility = System.Windows.Visibility.Visible;
LeftLabel.Visibility = System.Windows.Visibility.Visible;
image1.Visibility = System.Windows.Visibility.Visible;
//ends

//Hidden Items

DoubleAnimation img1 = new DoubleAnimation();
img.To = 0;
img.From = 0.7;

CenterImg1.BeginAnimation(OpacityProperty, img1);
CenterLabel1.BeginAnimation(OpacityProperty, img1);
image21.BeginAnimation(OpacityProperty, img1);

RightImg1.BeginAnimation(OpacityProperty, img1);
RightLabel1.BeginAnimation(OpacityProperty, img1);
image31.BeginAnimation(OpacityProperty, img1);

ExtremeRightImg.BeginAnimation(OpacityProperty, img1);
ExtremeRightLabel.BeginAnimation(OpacityProperty, img1);
image32.BeginAnimation(OpacityProperty, img1);

Extremeimage1.BeginAnimation(OpacityProperty, img1);
ExtremeLeftImg.BeginAnimation(OpacityProperty, img1);
ExtremeLeftLabel.BeginAnimation(OpacityProperty, img1);

LeftImg1.BeginAnimation(OpacityProperty, img1);
LeftLabel1.BeginAnimation(OpacityProperty, img1);
image112.BeginAnimation(OpacityProperty, img1);

CenterImg1.Visibility = System.Windows.Visibility.Hidden;
CenterLabel1.Visibility = System.Windows.Visibility.Hidden;
image21.Visibility = System.Windows.Visibility.Hidden;

RightImg1.Visibility = System.Windows.Visibility.Hidden;
RightLabel1.Visibility = System.Windows.Visibility.Hidden;
image31.Visibility = System.Windows.Visibility.Hidden;

image32.Visibility = System.Windows.Visibility.Hidden;
ExtremeRightImg.Visibility = System.Windows.Visibility.Hidden;
ExtremeRightLabel.Visibility = System.Windows.Visibility.Hidden;

Extremeimage1.Visibility = System.Windows.Visibility.Hidden;
ExtremeLeftImg.Visibility = System.Windows.Visibility.Hidden;
ExtremeLeftLabel.Visibility = System.Windows.Visibility.Hidden;

LeftImg1.Visibility = System.Windows.Visibility.Hidden;
LeftLabel1.Visibility = System.Windows.Visibility.Hidden;
image112.Visibility = System.Windows.Visibility.Hidden;

}

private void ExtremeRightLabel_MouseUp(object sender, MouseButtonEventArgs e)
{
DropShadowEffect effectsImg = new DropShadowEffect();
effectsImg.BlurRadius = 15;
effectsImg.Direction = 270;
effectsImg.ShadowDepth = 7;
ExtremeRightImg.Effect = effectsImg;

}
}
}

Timer Function in C# WPF XAML

2013-01-17T03:27:00.001-08:00

Download Source Code : TimerFunction

Screen Shot :

C# Code :

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Timers;

using System.Windows.Forms;

using System.Windows.Threading;

namespace timeFunction

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

DispatcherTimer timer;

public MainWindow()

{

InitializeComponent();

timer = new DispatcherTimer();

timer.Interval = TimeSpan.FromSeconds(1.0);

timer.Start();

timer.Tick += new EventHandler(delegate(object s, EventArgs a)

{

label1.Content = ((DateTime.Now.Hour > 12) ? DateTime.Now.Hour % 12 : DateTime.Now.Hour) + ":"

+ DateTime.Now.Minute + ":"

+ DateTime.Now.Second

+ ((DateTime.Now.Hour > 12) ? " pm" : " am");

});

}

XML Parser in c# Windows form application

2013-01-17T02:52:00.001-08:00

Download Source Code Here : SimpleXMLParser
Screen Shots :

C# Code :

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Xml;

namespace SimpleXMLParser

{

/// <summary>

/// Summary description for Form1.

/// </summary>

public class Form1 : System.Windows.Forms.Form

{

private System.Windows.Forms.Button button1;

/// <summary>

/// Required designer variable.

/// </summary>

private System.ComponentModel.Container components = null;

public Form1()

{

// Required for Windows Form Designer support

InitializeComponent();

// TODO: Add any constructor code after InitializeComponent call

}

/// <summary>

/// Clean up any resources being used.

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

base.Dispose( disposing );

}

#region Windows Form Designer generated code

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.button1 = new System.Windows.Forms.Button();

this.SuspendLayout();

// button1

this.button1.Location = new System.Drawing.Point(78, 199);

this.button1.Name = "button1";

this.button1.Size = new System.Drawing.Size(128, 32);

this.button1.TabIndex = 0;

this.button1.Text = "Read XML File !";

this.button1.Click += new System.EventHandler(this.button1_Click);

// Form1

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(292, 266);

this.Controls.Add(this.button1);

this.Name = "Form1";

this.Text = "XML Parser";

this.ResumeLayout(false);

}

#endregion

/// <summary>

/// The main entry point for the application.

/// </summary>

[STAThread]

static void Main()

{

Application.Run(new Form1());

}

private void button1_Click(object sender, System.EventArgs e)

{

try

{

XmlDocument xDoc = new XmlDocument();

xDoc.Load("sampleXML.xml"); //File is located in the "\bin\Debug" folder

XmlNodeList name = xDoc.GetElementsByTagName("myName");

XmlNodeList telephone = xDoc.GetElementsByTagName("myTelephone");

XmlNodeList email = xDoc.GetElementsByTagName("myEmail");

XmlNodeList age = xDoc.GetElementsByTagName("myAge");

XmlNodeList sex = xDoc.GetElementsByTagName("mySex");

MessageBox.Show(

"Name: " + name[0].InnerText +"\n"+

"Telephone: " + telephone[0].InnerText +"\n"+

"Email: "+ email[0].InnerText +"\n"+

"Age: "+ age[0].InnerText +"\n"+

"sex: "+ sex[0].InnerText +"\n"

);

}

catch(Exception ex)

{

MessageBox.Show(ex.Message);

}

Snake Game in WPF C#

2013-01-11T03:08:00.004-08:00

Download Complete Soulution Here: Snake Game
Screen Shots:

Splash Screen

Menu Window

Source Code: XAML

<Window x:Class="WpfApplication2.MenuWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="MenuWindow" Height="474" Width="500" WindowStyle="None" AllowsTransparency="True" Background="{x:Null}" WindowStartupLocation="CenterScreen" Icon="/WpfApplication2;component/image/Snakeicon.png">

<Grid>

<Ellipse.Effect>

</Ellipse.Effect>

<Ellipse.Fill>

</LinearGradientBrush>

</Ellipse.Fill>

<Ellipse.Stroke>

</LinearGradientBrush>

</Ellipse.Stroke>

</Ellipse>

<Image.Effect>

</Image.Effect>

</Image>

<Label.Effect>

</Label.Effect>

</Label>

<Label.Effect>

</Label.Effect>

</Label>

<Label.Effect>

</Label.Effect>

</Label>

<Label.Effect>

</Label.Effect>

</Label>

<Image.Effect>

</Image.Effect>

</Image>

<Label.Effect>

</Label.Effect>

<Label.BorderBrush>

</LinearGradientBrush>

</Label.BorderBrush>

<Label.Background>

</LinearGradientBrush>

</Label.Background>

</Label>

</Grid>

</Window>

C# Code:

using System;

using System.IO;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Media.Imaging;

using System.Windows.Shapes;

namespace WpfApplication2

{

/// <summary>

/// Interaction logic for MenuWindow.xaml

/// </summary>

public partial class MenuWindow : Window

{

public MenuWindow()

{

InitializeComponent();

}

private void newGameBtn_MouseDown(object sender, MouseButtonEventArgs e)

{

WpfApplication1.Window1 gameWindow = new WpfApplication1.Window1();

gameWindow.Show();

this.Close();

}

private void ExitBtn_MouseDown(object sender, MouseButtonEventArgs e)

{

this.Close();

}

private void image1_MouseDown(object sender, MouseButtonEventArgs e)

{

this.DragMove();

}

private void image2_MouseEnter(object sender, MouseEventArgs e)

{

DoubleAnimation setImageOpacity = new DoubleAnimation();

setImageOpacity.To = 1;

setImageOpacity.From = 0;

tagInfoimg.BeginAnimation(OpacityProperty, setImageOpacity);

}

private void image2_MouseLeave(object sender, MouseEventArgs e)

{

DoubleAnimation setImageOpacity = new DoubleAnimation();

setImageOpacity.To = 0;

setImageOpacity.From = 1;

tagInfoimg.BeginAnimation(OpacityProperty, setImageOpacity);

}

private void image2_MouseDown(object sender, MouseButtonEventArgs e)

{

// Set opacity of Label Snake Game v1.0

label2.Visibility = System.Windows.Visibility.Visible;

image2.Visibility = System.Windows.Visibility.Visible;

ellipse1.Visibility = System.Windows.Visibility.Visible;

newGameBtn.Visibility = System.Windows.Visibility.Visible;

ExitBtn.Visibility = System.Windows.Visibility.Visible;

label1.Visibility = System.Windows.Visibility.Visible;

DoubleAnimation setOpacity = new DoubleAnimation();

setOpacity.To = 0;

setOpacity.From = 1;

setOpacity.RepeatBehavior = RepeatBehavior.Forever; // it will do animation forever.

label2.BeginAnimation(OpacityProperty, setOpacity);

// set opacity of snake image.

DoubleAnimation setImageOpacity = new DoubleAnimation();

setImageOpacity.To = 1;

setImageOpacity.From = 0;

image1.BeginAnimation(OpacityProperty, setImageOpacity);

image2.Visibility = System.Windows.Visibility.Hidden;

label3.Visibility = System.Windows.Visibility.Hidden;

}

private void label1_MouseDown(object sender, MouseButtonEventArgs e)

{

// High Score File Reading

// File is placed at Debug Directory

string[] readFromFile = File.ReadAllLines("Highscore.txt"); // Data Reading from existing file. File is class and ReadAllLines is its static method.

int[] highscore = new int[readFromFile.Length]; // we must have integer array equal length of data read from file.

//data was read in String array. as you know score is in integer format. so you need to parse it.

for (int i = 0; i < highscore.Length; i++) {

highscore[i] = int.Parse(readFromFile[i]);

}

highscore = sortInteger(highscore); // Sorting function is called to sort array in ascending order.

// to show only top scorers you need to start loop in the reverse order. for top three scorers you bound it for 3 iterations.

for (int i = (highscore.Length - 1); i > (highscore.Length - 4); i--) {

MessageBox.Show(highscore[i].ToString());

}

private int[] sortInteger(int[] highscore) {

//Sorting array

Array.Sort(highscore);

return highscore;

}

/////////////////////////////////////////////// Menu Window Ends////////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////// Game Play Starts//////////////////////////////////////////////////////////////////////////////////////////

Game Play

XAML Code:

<Window x:Class="WpfApplication1.Window1"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="Snake Bit Game" Height="422" Width="642" ResizeMode="NoResize" Icon="/WpfApplication2;component/image/Snakeicon.png">

</Canvas>

<Label.Effect>

</Label.Effect>

</Label>

</Grid>

</Window>

C# Code: With Comments

using System;

using System.IO;

using System.Collections.Generic;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Shapes;

namespace WpfApplication1

{

using System.Windows.Threading;

public partial class Window1 : Window

{

// This list describes the Bonus Red pieces of Food on the Canvas

private List<Point> bonusPoints = new List<Point>();

// This list describes the body of the snake on the Canvas

private List<Point> snakePoints = new List<Point>();

/// <summary>

/// Size of snake and eatables things

/// </summary>

private Brush snakeColor = Brushes.Green;

private enum SIZE

{

THIN = 4,

NORMAL = 6,

THICK = 8

};

/// <summary>

/// Moving Diection of snake can be changed from here.

/// </summary>

private enum MOVINGDIRECTION

{

UPWARDS = 8,

DOWNWARDS = 2,

TOLEFT = 4,

TORIGHT = 6

};

/// <summary>

/// Speed of Snake can be changed from here

/// </summary>

private TimeSpan FAST = new TimeSpan(10000); // Fast Speed

private TimeSpan MODERATE = new TimeSpan(30000); // moderate speed of snake can be handled here.

private TimeSpan SLOW = new TimeSpan(90000); // SLow Speed

private Point startingPoint = new Point(100, 100);

private Point currentPosition = new Point();

// Movement direction initialisation

private int direction = 0;

/* Placeholder for the previous movement direction

* The snake needs this to avoid its own body. */

private int previousDirection = 0;

/* Here user can change the size of the snake. and eatable things

* Possible sizes are THIN, NORMAL and THICK */

private int headSize = (int)SIZE.THICK;

private int length = 50; // length of snake is handled here.

private int score = 0; // Initiatl score.

private Random rnd = new Random(); // Random number which will add red balls for snake.

private DispatcherTimer timer;

public Window1()

{

InitializeComponent();

timer = new DispatcherTimer();

timer.Tick += new EventHandler(timer_Tick);

levellbl.Content = "1"; // level Label Number Setting

speedlbl.Content = "Speed : Slow"; // speed Setting here

/* Here user can change the speed of the snake.

* Possible speeds are FAST, MODERATE, SLOW and DAMNSLOW */

timer.Interval = SLOW; // Speed is Slow

timer.Start();

this.KeyDown += new KeyEventHandler(OnButtonKeyDown); // On any key down on keyboard device it will be triggered.

paintSnake(startingPoint); //Starting point of snake.

currentPosition = startingPoint;

// Instantiate Food Objects

int num = 0;

for (int n = 0; n < 1; n++)

{

paintBonus(num);

}

private void paintSnake(Point currentposition)

{

/* This method is used to paint a frame of the snake´s body

* each time it is called. */

Ellipse newEllipse = new Ellipse();

newEllipse.Fill = snakeColor;

newEllipse.Width = headSize;

newEllipse.Height = headSize;

Canvas.SetTop(newEllipse, currentposition.Y);

Canvas.SetLeft(newEllipse, currentposition.X);

int count = paintCanvas.Children.Count;

paintCanvas.Children.Add(newEllipse);

snakePoints.Add(currentposition);

// Restrict the tail of the snake

if (count > length)

{

paintCanvas.Children.RemoveAt(count - length);

snakePoints.RemoveAt(count - length);

}

private void paintBonus(int index)

{

Point bonusPoint = new Point(rnd.Next(5, 620), rnd.Next(5, 315)); // New points are generated which will add red balls.

//// Eatable red balls start////

Ellipse newEllipse = new Ellipse();

newEllipse.Fill = Brushes.Red;

newEllipse.Width = headSize;

newEllipse.Height = headSize;

Canvas.SetTop(newEllipse, bonusPoint.Y);

Canvas.SetLeft(newEllipse, bonusPoint.X);

paintCanvas.Children.Insert(index, newEllipse);

bonusPoints.Insert(index, bonusPoint);

//// Eatable red balls End////

}

private void timer_Tick(object sender, EventArgs e)

{

// Expand the body of the snake to the direction of movement

switch (direction)

{

case (int)MOVINGDIRECTION.DOWNWARDS:

currentPosition.Y += 1;

paintSnake(currentPosition);

break;

case (int)MOVINGDIRECTION.UPWARDS:

currentPosition.Y -= 1;

paintSnake(currentPosition);

break;

case (int)MOVINGDIRECTION.TOLEFT:

currentPosition.X -= 1;

paintSnake(currentPosition);

break;

case (int)MOVINGDIRECTION.TORIGHT:

currentPosition.X += 1;

paintSnake(currentPosition);

break;

}

// Restrict to boundaries of the Canvas

if ((currentPosition.X < 5) || (currentPosition.X > 620) ||

(currentPosition.Y < 5) || (currentPosition.Y > 315))

GameOver();

// Hitting a bonus Point causes the lengthen-Snake Effect

int n = 0;

foreach (Point point in bonusPoints)

{

if ((Math.Abs(point.X - currentPosition.X) < headSize) &&

(Math.Abs(point.Y - currentPosition.Y) < headSize))

{

length += 10;

score += 10;

scorelbl.Content = score.ToString();

if (score == 50) {

// MessageBox.Show("Level 1 Clear");

timer.Interval = MODERATE;

levellbl.Content = "2";

speedlbl.Content = "Speed : Moderate"; // speed Setting here

}

if (score == 100)

{

//MessageBox.Show("Level 2 Clear");

timer.Interval = FAST;

levellbl.Content = "3";

speedlbl.Content = "Speed : Fast"; // speed Setting here

}

// In the case of food consumption, erase the food object

// from the list of bonuses as well as from the canvas

bonusPoints.RemoveAt(n);

paintCanvas.Children.RemoveAt(n);

paintBonus(n);

break;

}

n++;

}

// Restrict hits to body of Snake

for (int q = 0; q < (snakePoints.Count - headSize*2); q++)

{

Point point = new Point(snakePoints[q].X, snakePoints[q].Y);

if ((Math.Abs(point.X - currentPosition.X) < (headSize)) &&

(Math.Abs(point.Y - currentPosition.Y) < (headSize)) )

{

GameOver();

break;

}

private void OnButtonKeyDown(object sender, KeyEventArgs e)

{

switch (e.Key)

{

case Key.Down:

if (previousDirection != (int)MOVINGDIRECTION.UPWARDS)

direction = (int)MOVINGDIRECTION.DOWNWARDS;

break;

case Key.Up:

if (previousDirection != (int)MOVINGDIRECTION.DOWNWARDS)

direction = (int)MOVINGDIRECTION.UPWARDS;

break;

case Key.Left:

if (previousDirection != (int)MOVINGDIRECTION.TORIGHT)

direction = (int)MOVINGDIRECTION.TOLEFT;

break;

case Key.Right:

if (previousDirection != (int)MOVINGDIRECTION.TOLEFT)

direction = (int)MOVINGDIRECTION.TORIGHT;

break;

}

previousDirection = direction;

}

private void GameOver()

{

StreamWriter writeData = new StreamWriter("Highscore.txt", true);

writeData.WriteLine(score);

writeData.Close();

MessageBox.Show("You Lose! Your score is "+ score.ToString(), "Game Over", MessageBoxButton.OK, MessageBoxImage.Hand);

this.Close();

}

Applets in Java

2012-12-06T09:17:00.001-08:00

Where Do Applets and Classes Come from?

When a web browser sees an applet tag and decides to download and play the applet,

it starts a long chain of events. Let's say your browser sees the following applet tag:

<APPLET codebase="http://metalab.unc.edu/javafaq/classes"

code="Animation.class" width="200" height="100" >

<PARAM NAME = “FRAMErATE” VALUE = “10”>

</APPLET>

1. The web browser sets aside a rectangular area on the page 200 pixels wide and

100 pixels high. In most web browsers, this area has a fixed size and cannot be

modified once created. The appletviewer in the JDK is a notable exception.

2. The browser opens a connection to the server specified in the codebase parameter, using port 80 unless another port is specified in the codebase URL. If there's no codebase parameter, then the browser connects to the same server that served the HTML page.

3. The browser requests the .class file from the web server as it requests any other file. If a codebase is present, it is prefixed to the requested filename. Otherwise, the document base (the directory that contains the HTML page) is used. For example:

GET /javafaq/classes/Animation.class HTTP 1.0

4. The server responds by sending a MIME header followed by a blank line (\r\n) followed by the binary data in the .class file. A properly configured server sends .class files with MIME type application/octet-stream. For example:

HTTP 1.0 200 OK

Date: Mon, 10 Jun 1999 17:11:43 GMT

Server: Apache/1.2.8

Content-type: application/octet-stream

Content-length: 2782

Last-modified: Fri, 08 Sep 1998 21:53:55 GMT

5. The web browser receives the data and stores it in a byte array. The byte code verifier goes over the byte codes that have been received to make sure they don't do anything forbidden, such as converting an integer into a pointer.

6. If the byte code verifier is satisfied with the bytes that were downloaded, then the raw data is converted into a Java class using the defineClass( ) and loadClass( ) methods of the current ClassLoader object.

7. The web browser instantiates the Animation class using its noargs constructor.

8. The web browser invokes the init( ) method of Animation.

9. The web browser invokes the start( ) method of Animation.

10. If the Animation class references another class, the Java interpreter first searches for

the new class in the user's CLASSPATH. If the class is found in the user's CLASSPATH,

then it is created from the .class file on the user's hard drive. Otherwise the web

browser goes back to the site from which this class came and downloads the .class file for the new class. The same procedure is followed for the new class and any other

class that is downloaded from the Net. If the new class cannot be found, a

ClassNotFoundException is thrown

Who Can an Applet Talk to and What Can It Say?

1. Applets cannot access arbitrary addresses in memory. Unlike the other restrictions in the list, which are enforced by the browser's SecurityManager instance, this restriction is a property of the Java language itself and the byte code verifier.

2. Applets cannot access the local filesystem in any way. They cannot read from or write to the local filesystem nor can they find out any information about files. Therefore, they cannot find out whether a file exists or what its modification date may be.

3. Applets cannot launch other programs on the client. In other words, they

cannot call System.exec( ) or Runtime.exec( ).

4. Applets cannot load native libraries or define native method calls.

5. Applets are not allowed to use System.getProperty( ) in a way that reveals

information about the user or the user's machine, such as a username or home

directory. They may use System.getProperty( ) to find out what version of

Java is in use.

6. Applets may not define any system properties.

7. In Java 1.1 and later, applets may not create or manipulate any Thread or

ThreadGroup that is not in the applet's own ThreadGroup. They may do this

in Java 1.0.

8. Applets cannot define or use a new instance of ClassLoader, SecurityManager, ContentHandlerFactory, SocketImplFactory, or URLStreamHandlerFactory. They must use the ones already in place.

9. An applet can only open network connections to the host from which the applet itself was downloaded.

10. An applet cannot listen on ports below 1,024. (Internet Explorer 5.0 doesn't

allow applets to listen on any ports.)

11. Even if an applet can listen on a port, it can accept incoming connections only

from the host from which the applet itself was downloaded.

Thread Scheduling And Socket

2012-12-06T08:56:00.000-08:00

1. Thread Scheduling

There are two kinds of thread scheduling, preemptive and cooperative.

A preemptive thread scheduler determines when a thread has had its fair share of CPU time, pauses that thread, and then hands off control of the CPU to a different thread.
A cooperative thread scheduler waits for the running thread to pause itself before handing off control of the CPU to a different thread.
A virtual machine that uses cooperative thread scheduling is much more susceptible to thread starvation than a virtual machine that uses preemptive thread scheduling.

2. Synchronization, wait(), notify(), notifyAll()

Monitor objects maintain a list of all threads waiting to enter the monitor object to execute synchronized methods. A thread is inserted in the list and waits for the object if that thread calls a synchronized method of the object while another thread is already executing in a synchronized method of that object. A thread also is inserted in the list if the thread calls wait while operating inside the object. However, it is important to distinguish between waiting threads that blocked because the monitor was busy and threads that explicitly called wait inside the monitor. Upon completion of a synchronized method, outside threads that blocked because the monitor was busy can proceed to enter the object. Threads that explicitly invoked wait can proceed only when notified via a call by another thread to notify or notifyAll. When it is acceptable for a waiting thread to proceed, the scheduler selects the thread with the highest priority.

A socket is a connection between two hosts. It can perform seven basic operations:

· Connect to a remote machine

· Send data

· Receive data

· Close a connection

· Bind to a port

· Listen for incoming data

· Accept connections from remote machines on the bound port

Client Sockets

· The program creates a new socket with a Socket( ) constructor.

· The socket attempts to connect to the remote host.

· Once the connection is established, the local and remote hosts get input and output streams from the socket and use those streams to send data to each other.

· This connection is full-duplex; both hosts can send and receive data simultaneously.

· What the data means depends on the protocol; different commands are sent to an FTP server than to an HTTP server. There will normally be some agreed-upon hand-shaking followed by the transmission of data from one to the other.

· When the transmission of data is complete, one or both sides close the connection. Some protocols, such as HTTP 1.0, require the connection to be closed after each request is serviced. Others, such as FTP, allow multiple requests to be processed in a single connection.

Threads

2012-12-06T08:55:00.001-08:00

1. Threads are subtasks in a program that can be in execution concurrently.

2. The concurrency that computers perform today is normally implemented as operating system primitives” available only to highly experienced “systems programmers.”

3. Java makes concurrency primitives available to the programmer.

4. Subclass the Thread class and override its run( ) method.

5. implement the Runnable interface and pass the Runnable object to the Thread constructor. Runnable has one method run().

6. Signature of function: public void run( )

7. run method may invoke other methods; it may construct other objects; it may even spawn other threads. The thread starts here and it stops here. When the run( ) method completes, the thread dies.

8. the run( ) method is to a thread what the main( )method is to a traditional nonthreaded program.

9. A single-threaded program exits when the main( ) method returns.

10. A multithreaded program exits when both the main( ) method and the run( ) methods of all nondaemon threads return. (Daemon threads perform background tasks such as garbage collection and don't prevent the virtual machine from exiting.)

11. Extending Thread Class

class A extends Thread

{

public static void main (String[] args)

{

Thread t = new A();

t.start( );

}

public void run()

{

//details

}

12. Implementing Runnable:

class A implements Runnable

{

public static void main (String[] args)

{

A a = new A();

Thread t = new Thread(a);

t.start( );

}

public void run()

{

//details

}

13. Passing Information to Thread.

14. Returning Information from Thread.

15. Avoid Race Condition.

16. A thread specified as daemon will cease execution when the thread that created it ends. Syntax: threadName.setDaemon(true);

17. A thread that is not daemon is called a user thread.

18. Synchronized methods

public synchronized void writeEntry(String message)

19. Every object that has synchronized methods has a monitor. The monitor lets only one thread at a time execute a synchronized method on the object.

20. Only one synchronized instance method for an object can execute at any given time. Only one synchronized static method for a class can execute at one time.

21. Synchronized Blocks

A code block can be declared as a synchronized on an object. Only one synchronized code block for an object can execute at any given time.

synchronized (System.out)

{

System.out.print(input + ": ");

for (int i = 0; i < digest.length; i++)

{

System.out.print(digest[i] + " ");

}

System.out.println( );

}

22. Thread Scheduling

All important threads get at least some time to run and that the more important threads get more time.
Threads should execute in a reasonable order.(e.g. not in series)
Thread should not suffer through starvation.

23. Thread Priority

Priority is specified as an integer ranging from 1(lowest) to 10(highest).
When multiple threads are able to run, generally the VM will run only the highest-priority thread,
public final void setPriority(int newPriority)
public final int getPriority( )

24. Suspension of Thread

There are 10 ways a thread can pause in favor of other threads or indicate that it is ready to pause. These are:

It can block on I/O.
It can block on a synchronized object.

A thread can wait on an object it has locked. While waiting, it releases the lock on the object and pauses until it is notified by some other thread. Another thread changes the object in some way, notifies the thread waiting on that object, and then continues.

It can yield.
It can go to sleep.

A thread that goes to sleep does hold onto all the locks it's grabbed. Consequently, other threads that need the same locks will be blocked even if the CPU is available.

It can join another thread.
It can wait on an object.
It can finish.

There's a nontrivial amount of overhead for the virtual machine in setting up and tearing down threads.

It can be preempted by a higher-priority thread.
It can be suspended.

It can stop.

Crystal Reporting (WPF Application + MYSQL Database) Complete Guide

2012-11-04T04:37:00.000-08:00

to generate crystal report in wpf c# application is little difficult. first of all read all requirements about platform you are using. Make sure that you have added following assemblies.

Platform:

Windows 7 64bit

WPF application

MYSQL database

MYSQL ODBC connector 32bit

make sure you have installed MYSQL ODBC connector. if there is mismatch of driver and application let say mysql ODBC is 64Bit/32Bit and wpf application is off 32Bit/64bit repectively then you will face this mismatch issue. to resolve this go to C:\Windows\SysWOW64 and run odbcad32.exe file if you have installed MYSQL ODBC connector 32bit on your PC. now create datasource like this:

now open visual studio and create wpf application. add crystal report on your project. as crystal report viewer os windows form component. go to Project from menu bar. click on project properties. and set target framework to .NET framework 4. now add xml in your window tag of WPF.

xmlns:winform="clr-namespace:CrystalDecisions.Windows.Forms;assembly=CrystalDecisions.Windows.Forms"

in your grid tag

<winform:CrystalReportViewer x:Name="rptviewer" />

</WindowsFormsHost>

and now create crystal report on your project.

create an instance of your crystal report like this:

CrystalReport1 e = new CrystalReport1();

rptviewer.ReportSource = e;

Calculator in WPF application C#.NET

2012-10-31T09:03:00.001-07:00

C# Code:
Download here: source code
Concatenate of two numbers:

namespace calculator
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}

private void button1_Click(object sender, RoutedEventArgs e)
{
string numberBTN = String.Concat(button1.Content.ToString(), textBox1.Text);
textBox1.Text = numberBTN;
}
}
}

XAML COde:

<Window x:Class="calculator.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Calculator" Height="350" Width="525">
<Grid>
<TextBox Height="27" HorizontalAlignment="Center" Margin="153,35,0,0" Name="textBox1" VerticalAlignment="Top" Width="200" />
<Button Content="1" Height="23" Margin="234,109,0,0" Name="button1" VerticalAlignment="Top" HorizontalAlignment="Left" Width="36" Click="button1_Click" />
</Grid>
</Window>

Applets in Java

2012-10-29T03:24:00.001-07:00

Applets

Where Do Applets and Classes Come from?

When a web browser sees an applet tag and decides to download and play the applet,

it starts a long chain of events. Let's say your browser sees the following applet tag:

<APPLET codebase="http://metalab.unc.edu/javafaq/classes"

code="Animation.class" width="200" height="100" >

<PARAM NAME = “FRAMErATE” VALUE = “10”>

</APPLET>

1. The web browser sets aside a rectangular area on the page 200 pixels wide and

100 pixels high. In most web browsers, this area has a fixed size and cannot be

modified once created. The appletviewer in the JDK is a notable exception.

GET /javafaq/classes/Animation.class HTTP 1.0

HTTP 1.0 200 OK

Date: Mon, 10 Jun 1999 17:11:43 GMT

Server: Apache/1.2.8

Content-type: application/octet-stream

Content-length: 2782

Last-modified: Fri, 08 Sep 1998 21:53:55 GMT

7. The web browser instantiates the Animation class using its noargs constructor.

8. The web browser invokes the init( ) method of Animation.

9. The web browser invokes the start( ) method of Animation.

10. If the Animation class references another class, the Java interpreter first searches for

the new class in the user's CLASSPATH. If the class is found in the user's CLASSPATH,

then it is created from the .class file on the user's hard drive. Otherwise the web

browser goes back to the site from which this class came and downloads the .class file for the new class. The same procedure is followed for the new class and any other

class that is downloaded from the Net. If the new class cannot be found, a

ClassNotFoundException is thrown

Who Can an Applet Talk to and What Can It Say?

3. Applets cannot launch other programs on the client. In other words, they

cannot call System.exec( ) or Runtime.exec( ).

4. Applets cannot load native libraries or define native method calls.

5. Applets are not allowed to use System.getProperty( ) in a way that reveals

information about the user or the user's machine, such as a username or home

directory. They may use System.getProperty( ) to find out what version of

Java is in use.

6. Applets may not define any system properties.

7. In Java 1.1 and later, applets may not create or manipulate any Thread or

ThreadGroup that is not in the applet's own ThreadGroup. They may do this

in Java 1.0.

8. Applets cannot define or use a new instance of ClassLoader, SecurityManager, ContentHandlerFactory, SocketImplFactory, or URLStreamHandlerFactory. They must use the ones already in place.

9. An applet can only open network connections to the host from which the applet itself was downloaded.

10. An applet cannot listen on ports below 1,024. (Internet Explorer 5.0 doesn't

allow applets to listen on any ports.)

11. Even if an applet can listen on a port, it can accept incoming connections only

from the host from which the applet itself was downloaded.

The Network Methods of java.applet.Applet

Using java.applet.Applet to Download Data

Sound
Images

public URL getDocumentBase( )

The getDocumentBase( ) method returns the URL of the page containing the applet.

Example

import java.applet.*;

import java.awt.*;

public class WhereAmI extends Applet {

public void paint (Graphics g) {

g.drawString(this.getDocumentBase().toString( ), 25, 50);

}

public URL getCodeBase( )

The getCodeBase( ) method returns the URL of the directory where the applet is

located. If the applet is in a JAR archive, then the codebase is the URL of the directory where the JAR archive is. If the applet is in a package (e.g.com.macfaq.applets.MyApplet instead of just MyApplet), then the codebase is the directory or JAR archive containing the outermost package such as com.

Downloading Images

public Image getImage(URL url)

Image myLogo = getImage (new URL("http://metalab.unc.edu/java/cup.gif"));

public Image getImage(URL url, String name)

Image logo = this.getImage(new URL("http://metalab.unc.edu/java/"),

"cup.gif");

Example

public class ImageView extends Applet {

Image picture;

public void init( ) {

try {

URL u = new URL(this.getCodeBase( ), this.getParameter("IMAGE"));

this.picture = this.getImage(u);

System.err.println(u);

}

catch (MalformedURLException e) {

// shouldn't happen, the codebase is never malformed

}

public void paint (Graphics g) {

g.drawImage(this.picture, 0, 0, this);

}

Note:

The getImage( ) method returns immediately, even before it knows whether the

image actually exists. The image isn't loaded until some other part of the program

actually tries to draw it, or you explicitly force the image to start loading

Downloading Sounds

public void play(URL u)

The play( ) method looks for a sound file at the URL u. If the sound file is found, then it is downloaded and played. Otherwise, nothing happens.

Example

try {

URL soundLocation =

new URL( "http://metalab.unc.edu/java/course/week9/spacemusic.au" );

play(soundLocation);

}

catch (MalformedURLException e) {

System.err.println(

Example

import java.applet.*;

import java.awt.*;

import java.net.*;

public class PlaySound extends Applet {

public void init( ) {

try {

URL u = new URL(this.getCodeBase( ), this.getParameter("sound"));

this.play(u);

}

catch (MalformedURLException e) {}

}

public void play(URL url, String filename)

This is similar to the previous method, except that it uses the url argument to find the sound file's directory and the filename argument to get the actual filename. For

Example:

play(new URL("http://www.macfaq.com/", "gong.au"));

public AudioClip getAudioClip(URL u)

The java.applet.AudioClip interface represents a sound. You can download a sound from a web site with the getAudioClip( ) method. Once you have an AudioClip object, play it at your leisure by calling the clip's play( ) and loop( ) methods; play( ) plays the file once, and loop( ) plays it repeatedly. Both of these methods let you keep the audio clip around for future use—unlike the play( ) method of the last section, which discarded the audio data after it had finished.

Example

AudioClip theGong;

try {

URL u = new URL(http://metalab.unc.edu/javafaq/gong.au);

theGong = this.getAudioClip(u);

theGong.loop();

//theGong.play();

}

catch (MalformedURLException e) {

System.err.println(e);

}

public AudioClip getAudioClip(URL url, String filename)

Example

import java.applet.*;

import java.awt.*;

public class RelativeBeep extends Applet implements Runnable {

private AudioClip beep;

private boolean stopped = false;

public void init( ) {

beep = this.getAudioClip(this.getDocumentBase( ),"sounds/beep.au");

if (beep != null) {

Thread t = new Thread(this);

t.start( );

}

public void start( ) {

this.stopped = false;

}

public void stop( ) {

this.stopped = true;

}

public void run( ) {

Thread.currentThread( ).setPriority(Thread.MIN_PRIORITY);

while (true) {

if (!stopped) beep.play( );

try {

Thread.sleep(5000);

}

catch (InterruptedException e) {}

The MediaTracker Class

1. This class is used for loading multiple images.

2. The java.awt.MediaTracker class can track the loading status of many different images and organize them into logical groups.

3. Create an instance of MediaTracker and then use the MediaTracker's addImage(Image pic, int ID ) method for each Image.

4. ID does not have to be unique; it is really a group ID that is used to organize different images into groups.

5. Before using the image, call a method such as checkID( ) to see whether the image is ready.

6. Other methods let you force loading to start, discover which images in a group have failed to load successfully, wait for images to finish loading, and so on.

7. The Constructor

The MediaTracker class has one constructor:

public MediaTracker(Component comp)

This constructor creates a MediaTracker object that tracks images for a specified Component. It's usually invoked like this:

MediaTracker tracker = new MediaTracker(this);

8. Adding Images to MediaTrackers

Image picture = this.getImage(this.getDocumentBase( ), "logo.gif");

MediaTracker tracker = new MediaTracker(this);

tracker.addImage(picture, 1);

public void addImage(Image image, int id, int width, int height)

The image will eventually be displayed scaled to the width ‘width’ and the height ‘height’.

9. Checking Whether Media Has Loaded

There are four check methods that tell you whether particular images tracked by a

MediaTracker have loaded. These are:

public boolean checkID(int id)

public boolean checkID(int id, boolean load)

public boolean checkAll( )

public boolean checkAll(boolean load)

10. public boolean checkID(int id)

This method checks whether all the images with the indicated ID that are tracked by

this MediaTracker have finished loading. If they have, it returns true; otherwise, it

returns false. Multiple Image objects may have the same ID.

public void paint(Graphics g) {

if (theTracker.checkID(1)) {

g.drawImage(thePicture, 0, 0, this);

}

else {

g.drawString("Loading Picture. Please hang on", 25, 50);

}

11. public boolean checkID(int id, boolean load)

This method checks whether all the Image objects with the indicated ID that are tracked by this MediaTracker have finished loading. If they have, it returns true; otherwise, it returns false. Multiple Image objects may have the same ID. If the boolean argument load is true, all images with that ID that are not yet being loaded will begin loading.

public void paint(Graphics g) {

if (theTracker.checkID(1, true)) {

g.drawImage(thePicture, 0, 0, this);

}

else {

g.drawString("Loading Picture. Please hang on", 25, 50);

}

12. public boolean checkAll( )

This method checks whether all the Image objects that are tracked by this object have

finished loading. ID numbers are not considered. If all images are loaded, it returns

true; otherwise, it returns false. It does not start loading images that are not already

13. public boolean checkAll(boolean load)

This version of checkAll( ) checks whether all the Image objects that are tracked by

this MediaTracker have finished loading. If they have, it returns true; otherwise, it

returns false. If the boolean argument load is true, then it also starts loading any

Image objects that are not already being loaded.

14. public void waitForID(int id) throws InterruptedException

This method forces the images with the ID number id that are tracked by this

MediaTracker to start loading and then waits until each one has either finished

loading, aborted, or received an error.

try {

tracker.waitForID(1);

}

catch (InterruptedException e) {

}

15. public boolean waitForAll( ) throws InterruptedException

The waitForAll( ) method starts loading all the images that are tracked by this

MediaTracker in up to four separate threads while pausing the thread that invoked it

until each tracked image has either finished loading, aborted, or received an error. An

InterruptedException is thrown if another thread interrupts the waiting thread.

Downloading the images is easy

à Create URL objects that point to each image.

à Then call Applet’s ‘Image getImage( )’ with each URL.

à Add returned image to MediaTracker Object.

à Use it (MediaTracker) to force the images to load;

à Then use waitForAll( ) to make sure all frames have loaded.

à Finally, call drawImage( ) method of class Graphics

to display the images in sequence.

Example A Very Simple Animator Applet

public class Animator extends Applet

implements Runnable, MouseListener {

private boolean running = false;

private int currentCell = 0;

private Vector cells = new Vector( );

private MediaTracker tracker;

public void init( ) {

this.addMouseListener(this);

String nextCell;

this.tracker = new MediaTracker(this);

for (int i = 0; (nextCell = this.getParameter("Cell" + i)) != null; i++) {

Image img = this.getImage(this.getDocumentBase( ), nextCell);

cells.addElement(img);

tracker.addImage(img, i);

// start loading the image in a separate thread

tracker.checkID(i, true);

}

public void run( ) {

// wait for all images to finish loading

try {

this.tracker.waitForAll( );

}

catch (InterruptedException e) {

}

for (currentCell=0; currentCell < cells.size( ); currentCell++)

{

if (!running) return;

// paint the cell

this.repaint( );

// sleep for a tenth of a second

// i.e. play ten frames a second

try {

Thread.sleep(100);

}

catch (InterruptedException ie) {}

}

public void stop( ) {

this.running = false;

}

public void start( ) {

this.running = true;

Thread play = new Thread(this);

play.start( );

}

public void paint(Graphics g) {

g.drawImage((Image) cells.elementAt(currentCell), 0, 0, this);

}

// The convention is that a mouseClick starts

// a stopped applet and stops a running applet.

public void mouseClicked(MouseEvent e) {

if (running) {

this.stop( );

}

else {

this.start( );

}

// do-nothing methods required to implement the MouseListener

interface

public void mousePressed(MouseEvent e) {}

public void mouseReleased(MouseEvent e) {}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

}

Polymorphism Concept in OOP

2012-10-29T02:33:00.000-07:00

Polymorphism is declaring a uniform interface that isn't type aware, leaving implementation details to concrete types that implement the interface.
ad-hoc polymorphism (looks like a duck and walks like a duck => is a duck). Can be seen in Haskell and Python for example.
generic polymorphism (where a type is an instance of some generic type). Can be seen in C++ for example (vector of int and vector of string both have a member function size).
subtype polymorphism (where a type inherits from another type). Can be seen in most OO programming languages (i.e. Triangle is a Shape).
Wikipedia: Polymorphism is a programming language feature that allows values of different data types to be handled using a uniform interface. Pretty straightforward for me.
Multiple implementations of the same interface.
Multiple forms of a single object is called Polymorphism.
Different objects can respond to the same message in different ways, enable objects to interact with one another without knowing their exact type.
Polymorphism is a programming feature that allows an object to have many types ('shapes') and lets you treat it as any of those types depending on what you need to do without knowing or caring about its other types.
Polymorphism at the lower level is the ability to invoke methods that are defined by the implementors of an interface from the interface instance.
Polymorphism is ability of an object to appear and behave differently for the same invocation. ex: each animal appear and sound differently ( when you hit it.

Trigonometry Function in c# WPF application

2012-10-27T10:26:00.001-07:00

Download Here: Source Code

<Window x:Class="Trigonometry.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="MainWindow" Height="350" Width="525">

<Grid>

</Grid>

</Window>

namespace Trigonometry

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

}

private void cosBTN_Click(object sender, RoutedEventArgs e)

{

MessageBox.Show( "Cos("+inputDisplay.Text+") = "+Math.Cos(double.Parse(inputDisplay.Text)).ToString());

}

private void sinBTN_Click(object sender, RoutedEventArgs e)

{

MessageBox.Show("Sin(" + inputDisplay.Text + ") = " + Math.Sin(double.Parse(inputDisplay.Text)).ToString());

}

private void tanBTN_Click(object sender, RoutedEventArgs e)

{

MessageBox.Show("Tan(" + inputDisplay.Text + ") = " + Math.Tan(double.Parse(inputDisplay.Text)).ToString());

}

private void cotBTN_Click(object sender, RoutedEventArgs e)

{

double cot = 1/(Math.Tan(double.Parse(inputDisplay.Text)));

MessageBox.Show("Cos(" + inputDisplay.Text + ") = " + cot.ToString());

}

private void cosecBTN_Click(object sender, RoutedEventArgs e)

{

double cosec = 1 / (Math.Sin(double.Parse(inputDisplay.Text)));

MessageBox.Show("Cosec(" + inputDisplay.Text + ") = " + cosec.ToString());

}

private void secBTN_Click(object sender, RoutedEventArgs e)

{

double sec = 1 / (Math.Cos(double.Parse(inputDisplay.Text)));

MessageBox.Show("Sec(" + inputDisplay.Text + ") = " + sec.ToString());

}

WPF Application with SQL Server 2008

2012-10-26T07:21:00.001-07:00

Download Here: SourceCode

using System.Data.SqlClient;

namespace dataBaseConnectionTutorial
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
SqlConnection connectToDataBase = null;
string connectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|Datadirectory|\testDataBase.mdf;Integrated Security=True;User Instance=True";
private void button1_Click(object sender, RoutedEventArgs e)
{
if (connectToDatabase())
{
MessageBox.Show("Connection Established");
}
else
{
MessageBox.Show("Connection couldn't be Established");
}
}
public bool connectToDatabase()
{
bool connectionStatus = false;
connectToDataBase = new SqlConnection(connectionString);
try
{
connectToDataBase.Open();
connectionStatus = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
connectionStatus = false;
}
return connectionStatus;
}

private void button2_Click(object sender, RoutedEventArgs e)
{
if (connectToDataBase == null)
{
MessageBox.Show("Please Connect to Database");
}
else
{
string query = "Select * from testTable";
SqlCommand queryToDataBase = new SqlCommand(query, connectToDataBase);
SqlDataReader dataReader = queryToDataBase.ExecuteReader();
while (dataReader.Read())
{
tableData.Items.Add(dataReader[1].ToString());
}
connectToDataBase.Close();
}
}
}
}

Remote Method invocation

2012-10-19T09:51:00.001-07:00

1. Networking has been concerned with two fundamental applications.

· The first application is moving files and data between hosts, which is handled by FTP, SMTP (email), HTTP, NFS, and many other protocols.

· The second application is allowing one host to run programs on another host.

2. Remote Method Invocation (RMI) is an example of the second application for networking: running a program on a remote host from a local machine.

3. RMI is a core Java API and class library that allows Java programs to call certain methods on a remote server.

4. The methods running on the server can invoke methods in objects on the client.

5. Return values and arguments can be passed back and forth in both directions.

6. In essence, parts of a single program run in a Java virtual machine on a local client while other parts of the same program run on a Java virtual machine on a remote server.

7. RMI creates the illusion that the distributed program is running on one system with one memory space holding all the code and data used on either side of the actual physical connection.

RMI API

1. The Remote Method Invocation API lets Java objects on different hosts communicate with each other.

2. A remote object lives on a server.

3. Each remote object implements a remote interface that specifies which of its methods can be invoked by clients.

4. Clients invoke the methods of the remote object almost exactly as they invoke local methods.

Example an object running on a local client can pass a database query as a String argument to a method in a database object running on a remote server to ask it to sum up a series of records. The server can return the result to the client as a double.

This is more efficient than downloading all the records and summing them up locally.

Programmer's perspective

From the programmer's perspective, remote objects and methods work just like the local objects and methods you're accustomed to. All the implementation details are hidden.

Import one package.
Look up the remote object in a registry (which takes one line of code).
Make sure that you catch RemoteException when you call the object's methods.
From that point on, you can use the remote object almost as freely and easily as you use an object running on your own system.

Remote Object

is an object whose methods may be invoked from a different Java virtual machine than the one in which the object itself lives, generally one running on a different computer.
Each remote object implements one or more remote interfaces that declare which methods of the remote object can be invoked by the foreign system.

Object Serialization

a way to convert the object into a stream of bytes.

When an object is passed to or returned from a Java method, what's really transferred is a reference to the object. Passing objects between two machines thus raises some problems.

The remote machine can't read what's in the memory of the local machine.
A reference that's valid on one machine isn't meaningful on the other.

There are two ways around this problem.

A special remote reference to the object (a reference that points to the memory in the remote machine) can be passed,
or a copy of the object can be passed.

When the local machine passes a remote object to the remote machine, it passes a remote reference. The object has never really left the remote machine.

However, when the local machine passes one of its own objects to the remote machine, it makes a copy of the object and sends the copy. The copy moves from the local machine to the remote machine.

The RMI Layer Model

1. To the programmer, the client appears to talk directly to the server.

2. In reality, the client program talks only to a stub. The stub passes that conversation along to the remote reference layer, which talks to the transport layer.

3. The transport layer on the client passes the data across the Internet to the transport layer on the server.

4. The server's transport layer then communicates with the server's remote reference layer, which talks to a piece of server software called the skeleton.

5. The skeleton communicates with the server itself.

6. In the other direction (server-to-client), this flow is simply reversed.

7. Logically, data flows horizontally (client-to-server and back), but the actual flow of data is vertical.

Registry

The registry is a program that runs on the server. It contains a list of all the remote objects that server is prepared to export and their names. A client connects to the registry and gives it the name of the remote object that it wants. Then the registry sends the client a reference to the object that it can use to invoke methods on the server.

Stub

The stub is a local object that implements the remote interfaces of the remote object; this means that the stub has methods matching the signatures of all the methods the remote object exports. In effect, the client thinks it is calling a method in the remote object, but it is really calling an equivalent method in the stub. Stubs are used in the client's virtual machine in place of the real objects and methods that live on the server. When the client invokes a method, the stub passes the invocation to the remote reference layer.

Skelton

The skeleton reads the arguments and passes the data to the server program, which makes the actual method call. If the method call returns a value, that value is sent down through the skeleton, remote reference, and transport layers on the server side, across the Internet and then up through the transport, remote reference, and stub layers on the client side.

Remote Reference Layer

On client side, the remote reference layer translates the local reference to the stub into a remote reference to the object on the server. Then it passes the invocation to the transport layer. On server side, the remote reference layer converts the remote references sent by the client into references for the local virtual machine. Then it passes the request to the skeleton.

Transport Layer

The transport layer sends the invocation across the Internet.

The Server Side

1. To create a new remote object, first define an interface that extends the

java.rmi.Remote interface.

2. Subinterface of Remote determines which methods of the remote object may be

called by clients. A remote object may have many public methods, but only those

declared in a remote interface can be invoked remotely. The other public methods

may be invoked only from within the virtual machine where the object lives.

3. Each method in your subinterface must declare that it throws RemoteException.

RemoteException is the superclass for most of the exceptions that can be thrown

when RMI is used. Many of these are related to the behavior of external systems and

networks and are thus beyond your control.

import java.rmi.*;

import java.math.BigInteger;

public interface Fibonacci extends Remote {

public BigInteger getFibonacci(int n) throws RemoteException;

public BigInteger getFibonacci(BigInteger n) throws RemoteException;

}

4. The next step is to define a class that implements this remote interface. This class

should extend java.rmi.server.UnicastRemoteObject, either directly or ndirectly

(i.e., by extending another class that extends UnicastRemoteObject):

public class UnicastRemoteObject extends RemoteServer

5. If extending UnicastRemoteObject isn't convenient—for instance, because you'd

like to extend some other class—then you can instead export your object as a remote

object by passing it to one of the static UnicastRemoteObject.exportObject( )

methods:

public static RemoteStub exportObject(Remote obj)throws RemoteException

Example

import java.rmi.*;

import java.net.*;

import java.rmi.server.UnicastRemoteObject;

public class FibonacciImpl implements Fibonacci {

public FibonacciImpl( ) throws RemoteException {

UnicastRemoteObject.exportObject(this);

}

public BigInteger getFibonacci(int n) throws RemoteException {

//impleementation

}

public BigInteger getFibonacci(BigInteger n) throws RemoteException

{

//impleementation

}

}//End Class

Public class FibonacciServer

{

public static void main(String[] args) {

try {

FibonacciImpl f = new FibonacciImpl( );

Naming.rebind("fibonacci", f);

System.out.println("Fibonacci Server ready.");

}

catch (RemoteException re) {

System.out.println("Exception in FibonacciImpl.main: " + re);

}

catch (MalformedURLException e) {

System.out.println("MalformedURLException " + e);

}

Although the main( ) method finishes fairly quickly here, the server will continue to

run because a nondaemon thread is spawned when the FibonacciImpl( ) exports the

FibonacciImpl object.

Client Side

import java.rmi.*;

import java.net.*;

public class FibonacciClient {

public static void main(String args[]) {

try {

Object o = Naming.lookup(“rmi://localhost:12/Fibonacci”);

Fibonacci calculator = (Fibonacci) o;

try {

BigInteger f = calculator.getFibonacci(1000);

}

}catch (RemoteException e) {

System.err.println("Remote object threw exception " + e);

}

catch (NotBoundException e) {

System.err.println(

"Could not find the requested remote object on the server");

}

Compiling the Stubs

rmic FibonacciImpl

copy the Fibonacci.class and FibonacciImpl_Stub.class files to both the directory on the remote server from which the Fibonacci object will be run and the directory on the local client where the Fibonacci object will be invoked.

Starting the Server

1. Start the registry first.

C:> start rmiregistry

The registry runs in the background. The registry tries to listen to port 1,099 by default.

2. Run the Server

Running the Client

1. Make sure that the client system has FibonacciClient.class, Fibonacci.class, and FibonacciImpl_Stub.class in its class path.

2. Run the Client

CallBacks

Server can call back methods of clients

Threads

The RMI specification says "A method dispatched by the RMI runtime to a remote object implementation may or may not execute in a separate thread. The RMI runtime makes no guarantees with respect to mapping remote object invocations to threads. Since remote method invocation on the same remote object may execute concurrently, a remote object implementation needs to make sure its implementation is threadsafe."

In other words, the RMI implementation is free to dispatch an incoming RMI call on any thread. It may dispatch them all consecutively to the same thread; concurrently to many threads; or any other way it likes. There is no implication that there is—or is not—one specific dispatch thread per exported object. There is no guarantee about mapping clients, or client threads, to server threads. There are no guarantees and you can make no assumptions. Your implementations of remote methods must be threadsafe. It is up to you.

Brick Out Game C# Language(Complete Source Code)

2012-10-03T09:51:00.000-07:00

Download Here: Brick Out Game c# Language
Video Tutorial:

Ball.cs File Code

using System;
using System.Drawing;
using System.Drawing.Drawing2D;

namespace BrickOut
{
/// <summary>
///
/// </summary>
public class Ball : GameObject
{
public int XStep = 5;
public int YStep = 5;

public Ball(string fileName) : base(fileName)
{
//
// TODO: Add constructor logic here
//
}

public Ball() : base("ball.gif")
{
//
// TODO: Add constructor logic here
//
}

public override void Draw(Graphics g)
{
base.Draw(g);
}

public void Move()
{
Position.X += XStep;
Position.Y += YStep;

}
}
}

Brick.cs Code

using System;

namespace BrickOut
{
/// <summary>
/// Summary description for Brick.
/// </summary>
public class Brick : GameObject
{
public Brick() : base("brick.gif")
{
//
// TODO: Add constructor logic here
//
}
}
}

3D Cube WPF C# Language

2012-10-03T09:46:00.000-07:00

Download Here: 3D_Cube_Wpf

XAML Code:

<Window x:Class="_3dCube.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Viewport3D Name="viewport3D1">
<Viewport3D.Camera>
<PerspectiveCamera x:Name="camMain" Position="6 5 4" LookDirection="-6 -5 -4">

</PerspectiveCamera>
</Viewport3D.Camera>
<ModelVisual3D>
<ModelVisual3D.Content>
<DirectionalLight x:Name="dirLightMain" Direction="-1,-1,-1">
</DirectionalLight>
</ModelVisual3D.Content>
</ModelVisual3D>
<ModelVisual3D>
<ModelVisual3D.Content>
<GeometryModel3D>
<GeometryModel3D.Geometry>
<MeshGeometry3D x:Name="meshMain"
Positions="0 0 0 1 0 0 0 1 0 1 1 0 0 0 1 1 0 1 0 1 1 1 1 1"
TriangleIndices="2 3 1 2 1 0 7 1 3 7 5 1 6 5 7 6 4 5 6 2 0 2 0 4 2 7 3 2 6 7 0 1 5 0 5 4">
</MeshGeometry3D>
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<DiffuseMaterial x:Name="matDiffuseMain">
<DiffuseMaterial.Brush>
<SolidColorBrush Color="Red"/>
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</GeometryModel3D.Material>
</GeometryModel3D>
</ModelVisual3D.Content>
</ModelVisual3D>
</Viewport3D>
</Grid>
</Window>

C# Code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

namespace _3dCube

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

}