CFETCH

How to enable and disable developer options in Android.

2016-11-20T22:10:00.000+05:30

Hey, Guys!! Today in this post we will be talking about how to enable developer options in android. If we talk in the context of developer option it is the basic step in order to allow debugging on a physical device. Let's check out the steps to enable developer options.

1. Navigate to settings.
2. Search for About Phone
3. In About Phone check for Builder number and press on it for 7 times.

As soon as you click the seventh time it will show you a message "You are a developer". Our work is done your device is now ready to start debugging.

Disable developer option:

1. Turn of developer option.
2. Go to Apps and search for settings.
3. Clear settings data

And here we have successfully disabled developer option. I have also provided a video tutorial for enabling developer option.

How to make marquee continuous.

2016-08-08T10:06:00.001+05:30

I have been searching around the web to find a solution for creating a continuous marquee. And after trying a lot of solution I came up with the perfect solution. And I would like to share it with you all.

The solution that I have found is too simple. It just requires three simple steps and the plugin which i have used will be configured as show in the article below.

Step 1 : We have to add a link to the two external JavaScript in the head section of html file. You can use it from CDN or download it and save locally in you project.Here in this example I have used it from the CDN.

jquery.marquee.min.js | Download Link
jquery.pause.js | Download Link

SCRIPT:

1 2	<script src="http://cdn.jsdelivr.net/jquery.marquee/1.3.1/jquery.marquee.min.js" type="text/javascript"> <script src="https://rawgit.com/tobia/Pause/master/jquery.pause.js" type="text/javascript">

Step 2 : You have to add a class selector to the div. Here in the below example, I have named it as marquee. You can name it whatever you want according to the requirement. And also you need to add some simple CSS for the div as shown below.

HTML:

<div class='marquee'>
       .... 
       images
       ....
    </div>

CSS:

.marquee {
  width: 300px; /* the plugin works for responsive layouts so width is not necessary */
  overflow: hidden;
  border:1px solid #ccc;
}

Step 3 : How to apply the plugin with option to use this marquee selector class.The basic option you need to provide to to make the marquee continuous are duration and duplicated. You can provide other options as per requirement.

JAVASCRIPT:

$(function () {
    $('.marquee').marquee({
        duration: 5000,
         duplicated: true,
         gap: 00, 
         direction: 'left',
         pauseOnHover: true
    });
});

If you want to explore more about this JavaScript follow the link: aamirafridi/jQuery.Marquee. You can find more option to configure your marquee.

Check out my sample on JSFiddle: Example 1 | Example 2 and also my Stack Overflow answer on how to create a continuous marquee logo loop @ Answer Link

C# program to find a maximum number from the array.

2015-11-04T01:07:00.001+05:30

Introduction:

In this post, we are going to implement a simple program, which requires a simple logic called "Comparison". Don't get shocked this is true we are going to implement a simple program which compare array members and give us the largest number among all the numbers as output.

Background:

To implement this program, you must be aware of an array, how to initialize an array? and how to compare to members of an array? I guess that you are familiar with an array and moving towards implementation.

And if someone is not aware to an array then they can refer this link. Array

Implementation:

Implementation of this program is quite simple we just need two for loops one to ask from input from a user and store it in an array and the second to compare the members and find the max one.But here in this program I have used one extra for loop to display the members of an array, by the way, it is not compulsory.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr = new int[5];
            int i, max = 0;
            Console.WriteLine("Enter the 5 number:");
            for (i = 0; i <= 4; i++)
            {
                arr[i] = Convert.ToInt16(Console.ReadLine());
            }

            Console.WriteLine("Entered Array Values Are:");
            for (i = 0; i <= 4; i++)
            {
                Console.WriteLine(arr[i]);
            }


            for (i = 0; i <= 4; i++)
            {
                if (arr[i] > max)
                {
                    max = arr[i];
                }
            }
            Console.WriteLine("Maximum Number is:" + max);
        }
    }
}

Here I am asking for just five numbers because I have created an integer array of 5 elements.You can specify your own size by just replacing 5 with a size you want.If we talk about logic then I can say that first I have taken integer variable m to store maximum number and initiate it to 0, now when the if condition checks that if there is a number greater than the maximum number then make it maximum and store it in m.This continues until all the members of the array are not compared and finally print the value of m on the console as the maximum value.

As of in this post today we have seen quite a simple program, in my next post I will come up with an interesting program to share with you.

Please Do share, comment, and subscribe my blog.Enjoy coding!!!!

Design Patterns in C#

2015-11-01T19:34:00.000+05:30

The Design pattern is a solution to software design problems you find in real world application development.It is a way in which software are build so that the code may be reusable when required.The selection of appropriate design pattern is very necessary, before starting the development of any software.It is not compulsory that you have to select design pattern from the available list, you can make your own custom pattern also.

While solving a particular problem, you come up with a solution that can be reused at many of the solutions on which you are working then you can select that structure of solving the problem as your custom design pattern.Make your own class libraries and share it within your company.It will be your custom design pattern.

Patterns are about reusable designs and interaction of objects.
It is the best practice used by experienced software developers.

Patterns are categorized in 3 major groups:

Creational Pattern
Structural Pattern
Behavioral Pattern

There is a big list of design pattern belonging to each of the above group, we are not going to discuss all of them. Instead, we are going to check out most widely used design patterns in software development.You can check out the list of all the available design pattern at MSDN. The most used design patterns are listed below.

Singleton Pattern(Creational Pattern)
Factory Method Pattern(Creational Pattern)
Observer Pattern(Behavioral Pattern)
Dependency Injection

It is difficult to cover all the patterns in a single post, so in this post we are going to explore Singleton Pattern.

Singleton Pattern:

Singleton pattern is used when we want to provide global access to the objects, but the constraint is that there must be only single instance available or we can say we want to implement a class in a way that can be accessed globally, but we can just only make a single instance of that class.In practice, there are many different ways available to implement singleton pattern.but we are going to implement it using the simplest way available.

Implementation:

Firstly, we have to create a class(singleton) which doesn’t allow to create an object from outside of that class, So this can be achieved using a private constructor.

class singleton
{
  private singleton()
  {
  }
}

Now we cannot create the instance of the above class outside that class. This will not fulfill our requirement of exposing an only single instance of the class. To achieve that we have to instantiate the class inside of that class and store that instance in a private static variable. After implementing this requirement, our class will look like this.

   class singleton
    {
        private static singleton _instance;
        private singleton()
        {
        }
        public static singleton Instance()
        {
            _instance = new singleton();
            return _instance;           
        }
     }

Now every time when Instance() method called it will create a new object for that class so this is not what we actually need.We just need a single instance of that class to be created. So we need to make a simple check to limit the creation of an instance of the singleton class.

class singleton
{
     private static singleton _instance;
     private singleton()
     {
     }
     public static singleton Instance()
     {
         if (_instance == null)
         {
             _instance = new singleton();
         }
         return _instance;
     }
}

Yes, we are done now. It's a singleton class now, with the only single instance is exposed globally for use.Now let's make a simple example to check that our singleton class is really working or not.In this example will try to make two make to an instance of the class and then compare both instance to see if they both are same or not.If both are same then it will return "Singleton is applied" otherwise "Singleton is not applied".

Example:

class Program
    {
        static void Main(string[] args)
        {
            singleton s1 = singleton.Instance();
            singleton s2 = singleton.Instance();
            if (s1 == s2)
            {
                Console.WriteLine("Singleton is appiled");
            }
            else
            {
                Console.WriteLine("Singleton is not applied");
            }
        }
    }

    class singleton
    {
        private static singleton _instance;
        private singleton()
        {
        }
        public static singleton Instance()
        {
            if (_instance == null)
            {
                _instance = new singleton();
            }
            return _instance;
        }
    }

Output:

It's done our singleton class is working as expected.In our next post, we will continue with one of the other remaining design patterns.If you have learned anything from our post please do comment, follow us on twitter and like our Facebook page.

C# program to find factorial of number using goto loop.

2015-11-01T18:59:00.004+05:30

Introduction:

In post related to the Factorial Program we have seen how to implement Factorial program using For Loop and Do-While Loop. Now in this post we are going to take a look on one interesting program in which we will try to implement Factorial Program using goto loop.It will be fun to implement this program once we are familiar to goto. So before moving further we will check out what is goto.

Background:

Before implementing this program you must be familiar with goto loop and the concept of factorial.

goto:

goto is an unconditional jump statement in programming.It would jump to particular location marked as label and then continue the execution of the program for there.We can use goto where we want to skip some line of code and continue from some other location.But i would not advise the use of goto in large programs, because it makes difficult to know the flow of program.

Syntax: goto label;
        ..........
        ..........
        ..........
        label:statements;

To know more follow the links:

Reference for goto: MSDN | DotNET Perls

Factorial: Math is Fun

Implementation:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            int i = 0;
            int fact = 1;
            Console.WriteLine("Enter Number");
            i = Convert.ToInt16(Console.ReadLine());

            Factorial:
            

               fact = fact * i;
               i=i-1;

               while(i!=0)
                {
                    goto Factorial;
                }
            Console.WriteLine(fact);
            }
        }
    }

C# program to find the Fibonacci Sequence using recursion.

2015-10-31T12:23:00.002+05:30

In our previous post we have discussed a lot of interesting thing about Fibonacci Sequence and then implemented the program to find the Fibonacci Sequence for the terms entered by the user,but the main thing is that we have created that program without recursion and in this post we are going to first take a bird view on recursion and then try to implement the program.So let's start with recursion.

Recursion:

The simple meaning of recursion is the repeated application of any procedure.And if talk in context of programming then recursion is to call a method repeatedly or use call the function by itself.And we can't say that using of recursive call may always going to improve the performance.It depends on how the recursion call is made.Here in our program we are going to use tail recursive call.

To know more about recursion follow the link : Recursion

Now let us move toward implementing our program using recursion.We are going to make a function named FibonacciFunction() and implement our logic in that function and make a self call.Logic is implemented in a way that if user enter 0 as input he will not get any out put.For 1 he will get 0 as output and for any other input result are calculated accordingly.Below is our final logic to implement Fibonacci Program using recursion in C#.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static int Main(string[] args)
        {

            int n, i = 0, c;
            Console.WriteLine("Enter the number of terms:");
            n = Convert.ToInt16(Console.ReadLine());

            Console.WriteLine("Fibonacci series\n");
           
            for (c = 1; c <= n; c++)
            {
                int result = FibonacciFunction(i);
                Console.Write(result + " " );
                i++;
            }
            Console.WriteLine();
            return 0;
        }

        public static int FibonacciFunction(int n)
        {
            if (n == 0)
            {
                return 0;
            }
            else if (n == 1)
            {
                return 1;
            }
            else
            {
                return (FibonacciFunction(n - 1) + FibonacciFunction(n - 2));
            }
        }

    }
}

Output:

Here in this program implementing recursion may not going to improve the performance.

C# Program to find Fibonacci Sequence for the given number.

2015-10-30T23:14:00.001+05:30

In this post today we are going to first take a look on what is Fibonacci Series and then try to implement C# program for finding the Fibonacci Sequence for a number.We will try to make implement this program without recursion and without recursion.

Fibonacci Sequence :

Fibonacci Sequence is name behind a Italian mathematician Fibonacci.The logic behind it so simple and it is quite easy to understand.In Fibonacci Sequence every third number is sum of the first two number. The starting point for the series may be 1 and 1 or 0 and 1 depending on the selection of the starting point further series is calculated.

One interesting thing about Fibonacci is that if we start making squares corresponding to the number in the calculated Fibonacci Series and join the opposite angles, then you will get a spiral curve as show in below image.

Image From https://www.mathsisfun.com

Series starting with 0: 0,1,1,2,3,5,8,13,21...........
Series starting with 1: 1,1,2,3,5,8,13,21,........

If you are interested to know more about Fibonacci Sequence Follow: Wikipedia | Mathsisfun

Now let us move towards making our Fibonacci Series generator console app. I guess that you are familiar of creating a new C# console application in visual studio.In our first app we are going to make a simple application which can find Fibonacci for the number entered by the user.

Let us first build the logic as we know we are going to add first two number in order to get the third one.Let's take three variables a,b,c.

c=a+b;

Here c = Sum of two number,

a = First Number,

b = Second Number.

But now the question is what will be the value of a and b.Here a and b will become our starting point we have to initialize them with 0 and 1 or 1 and 1 depending on our choice of starting point.Now to complete our logic we have to pass value of b to a and value of c to b and iterating it within the for loop.So our final logic will look like this.

1.Fibonacci Program without recursion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            int a=0, b=1, c=0,no=0;
            Console.WriteLine("Enter number to print Fibonacci for:");
            no = Convert.ToInt16(Console.ReadLine());
            for (int i = 0; i <=no; i++)
            {
                Console.WriteLine(a);
                c = a + b;
                a = b;
                b = c;
                
            
            }

        }
    }
}

So in this post we have created Fibonacci Series program using simple for loop. In our next post we will implement this program using recursion.

Create a multilevel menu in linq .

2015-10-25T13:52:00.000+05:30

In this post we will see how to generate a multilevel menu in Linq or we can as flatten a hierarchical collection of objects in Linq. For that purpose we are going to make new C# console application.we will design this application such that root node will follow the below shown pattern.

Root Node Name ( Count Of Child Node)Is Child of(Parent Node)

Child Node Name 1
Child Node Name 2
...........

Now lets us first of all add two classes to our application to our application.This two class will be Menu and MenuItem . MenuItem class will have properties like id,name,list of children and a parent node to track its root node. Menu class will have properties like id, name and a nullable parent id, because a root node may or may not have any root node.Below i have show the code for Menu and Menuitem class.

1.Menu Class

 public class Menu
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public int? ParentID { get; set; }

        public Menu(int id, string name, int? parentID)
        {
            this.ID = id;
            this.Name = name;
            this.ParentID = parentID;
        }
    }

2.Menuitem Class

public class MenuItem
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public IList<MenuItem> Children { get; set; }
        public MenuItem Patent { get; set; }
    }

Now let us move towards the next step of creating a multilevel menu.so far we have created two classes named Menu and MenuItem .Now it's time to adding content to our menu.I have added members to the menu so that i can get the output as show in below image.

3.Code To Add Menu Members

 List<Menu> menus = new List<Menu>();
            menus.Add(new Menu(0, "Level 0", null));
            menus.Add(new Menu(1, "Level 1", 0));
            menus.Add(new Menu(2, "Level 1.1", 1));
            menus.Add(new Menu(3, "Level 1.2", 1));
            menus.Add(new Menu(4, "Level 1.2.1", 3));
            menus.Add(new Menu(5, "Level 1.2.2", 3));
            menus.Add(new Menu(6, "Level 1.2.3", 3));
            menus.Add(new Menu(7, "Level 2", 0));
            menus.Add(new Menu(8, "Level 2.1", 7));
            menus.Add(new Menu(9, "Level 2.1.2", 8));
            menus.Add(new Menu(10, "Level 2.2", 7));
            menus.Add(new Menu(11, "Level 2.2.2", 10));
            menus.Add(new Menu(12, "Level 3", 0));
            menus.Add(new Menu(13, "Level 3.1", 12));

As you can see i have created a list of type Menu and then using menu.Add() i have added member to list according to my requirement.This menu will have 3 root level and each root level have one or two children. The count of child will be shown beside the root node as shown in the above figure.

Now let us move towards the most important step of this code and that is the code to flatten this hierarchical menu using linq. Firstly we are going to use SQL like syntax to write the code and then we will convert it to lamda expression.You can use any of the code to generate your menu.

4.SQL Like Query Expression

public static IList<MenuItem> GenerateTree(IEnumerable<Menu> collection, Menu rootItem)
        {
            IList<MenuItem> lst = new List<MenuItem>();
            foreach (Menu c in collection.Where(c => c.ParentID == rootItem.ID))
            {
                lst.Add(new MenuItem
                {
                    ID = c.ID,
                    Name = c.Name,
                    Parent = new MenuItem() { ID=rootItem.ID,Name=rootItem.Name},
                    Children = GenerateTree(collection, c)

                });
            }
            return lst;
        }

So for creating our multilevel menu i have created a function named GenerateTree() with return type List<MenuItem>.If we talk about the working of this function it will accept two parameters Collection of Menu and rootItem . Inside that we are going to create a new list of children for that root item and add it to that MenuItem list.Here it may happen that the children may have children.To achieve we have to make a recursive call to our GenerateTree() function.Which i have stored in Children.

5.Printing the Menu

Now we have generated the menu according to our requirement,it's time to print it.For that i am going to create a new function named PrintTree() and passing menuitems and a tab space as parameter.It will also be a recursive function as shown below.

 public static void PrintTree(MenuItem menuItems, string tab)
        {
            Console.WriteLine(tab + menuItems.Name + string.Format("({0})",
                             menuItems.Children.Count) + "Is Child of "
                             + string.Format("({0})", menuItems.Parent.Name));
            foreach (var item in menuItems.Children)
            {
                PrintTree(item, tab + "\t");
            }
        }

6.Calling the Functions

Now let's move towards the last step in which we are going to make a call to this two above created function from our main method.

var result = GenerateTree(menus, menus.First());

            foreach (var item in result)
            {
                PrintTree(item, "\t");
            }

7.Final Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MultiLevelAdvanced
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Menu> menus = new List<Menu>();
            menus.Add(new Menu(0, "Level 0", null));
            menus.Add(new Menu(1, "Level 1", 0));
            menus.Add(new Menu(2, "Level 1.1", 1));
            menus.Add(new Menu(3, "Level 1.2", 1));
            menus.Add(new Menu(4, "Level 1.2.1", 3));
            menus.Add(new Menu(5, "Level 1.2.2", 3));
            menus.Add(new Menu(6, "Level 1.2.3", 3));
            menus.Add(new Menu(7, "Level 2", 0));
            menus.Add(new Menu(8, "Level 2.1", 7));
            menus.Add(new Menu(9, "Level 2.1.2", 8));
            menus.Add(new Menu(10, "Level 2.2", 7));
            menus.Add(new Menu(11, "Level 2.2.2", 10));
            menus.Add(new Menu(12, "Level 3", 0));
            menus.Add(new Menu(13, "Level 3.1", 12));

            var result = GenerateTree(menus, menus.First());

            foreach (var item in result)
            {
                PrintTree(item, "\t");
            }

        }

        public static void PrintTree(MenuItem menuItems, string tab)
        {
            Console.WriteLine(tab + menuItems.Name + string.Format("({0})", 
            menuItems.Children.Count));
            foreach (var item in menuItems.Children)
            {
                PrintTree(item, tab + "\t");
            }
        }

        public static IList<MenuItem> GenerateTree(IEnumerable<Menu> collection, 
         Menu rootItem)
        {
            IList<MenuItem> lst = new List<MenuItem>();
            foreach (Menu c in collection.Where(c => c.ParentID == rootItem.ID))
            {
                lst.Add(new MenuItem
                {
                    ID = c.ID,
                    Name = c.Name,
                    Children = GenerateTree(collection, c)
                });
            }
            return lst;
        }
    }

    public class MenuItem
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public IList<MenuItem> Children { get; set; }
        public MenuItem Patent { get; set; }
    }

    public class Menu
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public int? ParentID { get; set; }

        public Menu(int id, string name, int? parentID)
        {
            this.ID = id;
            this.Name = name;
            this.ParentID = parentID;
        }
    }
}

Bingo!!! it's done we have created a multilevel menu using linq sql like query expression in our next post we will edit our code according to lamda expression.If you have learnt some thing from thing article please vote up this article on Code Project.

Article at Code Project

C# Program to find Factorial of a number

2015-10-22T17:32:00.000+05:30

In this post today we are going to see two different program in first program we are going to find factorial of a number using for loop and in the other program we are going to find the factorial using do-while loop.And it will be a console application which accept a number from the user and give the factorial of number as output.

Before moving to actually making our factorial console application, let us take look on the two looping statements which we are going to use in our application

1.For Loop (Entry Control Loop)

for(init;condition;increment)
{
   //statements to be executed.
}

Here init is the initialization part of thee for loop where you can initialize the variable. which your age going to use at any value according to your requirement or we can say that the loop will start from that point.Init will be checked once we the loop start execution.

Condition is the part which will be checked to enter the for loop.If the condition is satisfied then and only then the statements inside the for loop are executed.Otherwise the statements are skipped.

After the control statements executed the control jump back to increment to update loop control variables.
Check More on Foor Loop:

2.Do-While Loop (Exit Control Loop)

do
{
    //statements
      increment
}
while(Condition)

Here in do-while loop all the statements inside the loop are executed once and the condition is checked at the end of the loop.
Check More on Do-while Loop:

Now let's move towards making our console application.Select the new console application under Visual C#.You can name it what ever you like, i'm going to name it "Factorial App".

Now there is no need to add any extra name space.You can just start writing program in the main method.First we are going to make program using for loop.

Using For Loop:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int i=0;
            int fact = 1;
            Console.WriteLine("Enter Number");
            i = Convert.ToInt16(Console.ReadLine());

            do
            {

                fact = fact * i;
                i--;

            } while (i != 0);

        }
    }
}

Using Do-while loop:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            int i = 0;
            int fact = 1;
            Console.WriteLine("Enter Number");
            i = Convert.ToInt16(Console.ReadLine());

            for (int j = 0; j < i;j++ )
            {

                fact = fact * i;

            } 
        }
    }
}

Download options:

Code Download:

1.Using For loop:

2.Using Do-while loop

Notes on classes and types of classes with runtime polymorphism example.

2015-10-18T18:41:00.000+05:30

In this post we will learn about types of classes in java with examples. In this example we will develop runtime polymorphism

Class:
A class is a top level block that is used for grouping variables and methods for developing logic.

Types of classes;
1) Interface
2) Abstract class
3) Concrete class
4) Final class
5) Enum

1) Interface;
It is fully unimplemented class used for declaring a set of operations of an object. It contains only public static final variables and public abstract methods. It is always created as root class. Interface tells what should implement but not how.

Let us consider an vehicle example, here we will create vehicle interface which tells what should we implement.

//Vehicle.java
interface Vehicle
{
       public void engine();
       public void breaks();
}

2) Abstract class:
It is partially implemented class used for developing some of the operations of an object. Abstract class is next level subclass. So it contains abstract methods, concrete methods including variables, blocks and constructors. It is always created as superclass next to interface.

In above we created vehicle as interface. So now here we will create bus, car, bike as abstract class, because we have different types of buses, cars, bikes with some common operarions and individual operations.

//Bus.java
abstract class Bus implements  Vehicles
{
      public void breaks()
      {
  System.out.println("Bus has two breaks");
      }
}

At bus level the method breaks() can only be implemented because it is common for all buses subclasses. The method engine() will be implemented in subclasses. So this class must be declared as abstract.

3) Concrete class;
It is fully implemented class used for implementing all operations of an object. It contains only concrete methods including variables, blocks and constructor. It is always created as subclass next to abstract class or interface in objects inheritance hierarchy.

In above we created Vehicle as interface and bus as abstract class which implements vehicle interface. So now here we will create RedBus, Volvo as concrete class by implementing all other operations which are left as abstract in its superclass(Bus.java).

//RedBus.java
class RedBus extends Bus
{
 public void engine()
 {
  System.out.println("RedBus engine capacity is 40 kmph");
 }
}
//Volvo.java
class Volvo extends Bus
{
 public void engine()
 {
  System.out.println("Volvo engine capacity is 100 kmph");
 }
}

So now develop a runtime polymorpic class to use all Vehicles operations

//Driver.java
class Driver
{
 public void assignVehicle(Vehicle v)
 {
  v.engine();
  v.breaks();
 }
}
//Depo.java
class Depo
{
 public static void main(String[] args)
 {
  Driver driver1=new Driver();
  driver1.assignVehicle(new Volvo());
  
                System.out.println("-------------------------------");

   Driver driver2=new Driver();
  driver1.assignVehicle(new Volvo());
 }
}

After running the appication output will be,

NOTE: If you want the above program in c#.net then visit http://csharphy.blogspot.in/

Download Option:

Program to Add any two types using Generics.

2015-10-17T01:41:00.001+05:30

This program is used to perform addition between any two types or concat between two strings using single method with Generics.

using System;
using System.Collections.Generic;

namespace Generics
{
    public class MyClass<T>
    {
        public T a;
        public T b;
        public void test(T i,T j)
        {
            a = i;
            b = j;
            Console.WriteLine(i.GetType());      
        }
    }
    public class test1
    {
        public void Add<T>(T a, T b)
        {
            dynamic i = a;
            dynamic j = b;
            Console.WriteLine(i+j);
        }
     
    }
    class Program
    {
        static void Main(string[] args)
        {
            test1 t = new test1();
         
            t.Add<int>(10,20);
            t.Add<string>("tushar"," patel");
        }
    }
}

Note:Here in the add method we have declared variables i and j as dynamic because 
their types are not known at compile time and are inferred at run time.And an dynamic variable 
can change it's type at run time.

Ex.     dynamic i =100;
        In this case i will initialized to 100 so it will be int32 type.But in case at run time 
        a string is assigned to it then it will become string type

        And if we talk about usage of dynamic, it is mostly used to make properties and return 
        value from function

To know more follow the link : Dynamic Variables

C# Program To Find Total Number of Odd And Even Numbers From An Array.

2015-10-16T22:17:00.001+05:30

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication10
{
class Program
{
static void Main(string[] args)
{
int[] arr = new int[5];
int ocount = 0, ecount = 0;

Console.WriteLine("Enter Array Values");
for (int i = 0; i < 5; i++)
{
arr[i] = Convert.ToInt16(Console.ReadLine());
}

for (int i = 0; i < 5; i++)
{
if (arr[i]%2==0)
{
ecount++;
}
else
{
ocount++;
}
}
Console.WriteLine("Total Even Numbers:" + ecount);
Console.WriteLine("Total Odd Numbers:" + ocount);
Console.ReadLine();
}

}
}

Star Pattern-4

2015-06-23T18:46:00.000+05:30

*****
****
***
**
*

#include<stdio.h>
#include<conio.h>
int main() 
{ 
int i, j, k,n; 
printf("Enter no. of rows for which you want to print*: \n"); 
scanf("%d",&n); 
for(i=n;i>=1;i--) 
{ 
for(j=n;j>=i;j--) 
{ 
printf(" "); 
} 
for(k=1;k<=i;k++) 
{ 
printf("*"); 
} 
printf("\n"); 
} 
return 0; 
}

Star Pattern-3

2015-06-22T21:44:00.000+05:30

*****
****
***
**
*

#include <stdio.h>
int main()
{
int r,c;
for(r=5;r>=1;r--)
 {
 for(c=1;c<=r;c++)
 {
 printf("*");
 }
 printf("\n");
 }
}

Download Options:

Star Pattern-2

2015-06-22T05:42:00.000+05:30

*
**

***
****

#include <stdio.h>

int main()
{
int i, j, k,n;
printf("Enter no. of rows for which you want to print*: \n");
scanf("%d",&n);
for(i=n;i>=1;i--)
{
for(j=1;j<i;j++)
{
printf(" ");
}
for(k=n;k>=i;k--)
{
printf("*");
}
printf("\n");
}

return 0;
}

Star Pattern-1

2015-06-21T19:29:00.000+05:30

*
**
***
****
*****

Program:

#include<stdio.h>
#include<conio.h>

void main()
{
 int r,c,n;
printf("Enter the number of rows for which you want to print *:");
scanf("%d",n);

for(r=1;r<=n;r++)
     {
      for(c=1;c<=r;c++)
           {
            printf("*");
            }
      printf("\n");
     }
getch();
}

Learn C Programming-02-Use of printf() to print in C console

2015-04-15T11:43:00.000+05:30

Hey Guy's!!!! Welcome to your 2nd C programming tutorial with Parth Patel.
In this tutorial we are going to take a look on printf() function,which is used to print anything in C console.Here in this tutorial we are going to print "Hello World" using printf() in C console..

Python Script to start the recording using Picamara in Rasoberry Pi

2015-02-09T15:30:00.000+05:30

Hii guys....
Today I'm going to write a python script to start the video recording in Picamera Using RaspberryPi..
For that You the following equpiment You need to integtare with raspberry pi..

PiCamera Connected to raspberry pi
Pir Sensor module connected to GPIO Pin to raspbeery Pi
5V Rapberry Pi Charger

Now, Here I am going to write the python script to start recording :

import RPi.GPIO as GPIO

import time

import picamera

import datetime # new

def get_file_name(): # new

return datetime.datetime.now().strftime("%Y-%m-%d_%H.%M.%S.h264")

sensor = 4

GPIO.setmode(GPIO.BCM)

GPIO.setup(sensor, GPIO.IN, GPIO.PUD_DOWN)

previous_state = False

current_state = False

cam = picamera.PiCamera()

while True:

time.sleep(0.1)

previous_state = current_state

current_state = GPIO.input(sensor)

if current_state != previous_state:

new_state = "HIGH" if current_state else "LOW"

print("GPIO pin %s is %s" % (sensor, new_state))

if current_state:

fileName = get_file_name() # new

cam.start_preview()

cam.start_recording(fileName) # new

else:

cam.stop_preview()

cam.stop_recording() # new

by Executing this program You will get the .H264 Video file, which will save in the same folder of your python script. This file shows date as a file name..

Learning C Programming-01-Installing Turbo C Editor

2015-01-25T16:30:00.000+05:30

Hey Guy's!!!

Welcome to your 1'st C programming Tutorial with Parth.

In this tutorial i have shown a step by step procedure to install Turbo C Editor in our laptop or desktop.

Download Link:

1. http://goo.gl/6hVygo

2. http://goo.gl/zeqNex

1. Download Turbo C Editor From the above link.

2.Click on it and give permission to install.

3.Click Next.

4.Click I Agree.

5.Click Next.

6.Click Finish.

It's done guy's Turbo C Editor is ready to use.If u have any problem comment below.

Work of include directive in C/C++.

2015-01-19T09:57:00.001+05:30

In this post we are going to understand what is include directive? And how it works? Also at the end of the post i had listed all the necessary header files which are used in C/C++ programming.

1. What is include directive?

Many programming languages have a directive often called as include (as well copy or import) that causes the content of another file to be copied into the original file.This include files are also called as copybooks or header files.They are often used to define physical layout of a program and for forward deceleration.

Forward deceleration is a deceleration of identifiers for which programmer has not yet given complete definition.

2.Working of include directive.

There are two methods to include a file in a program as shown below:

1. #include<header file name>

2. #include"header file name"

In C and C++, the #include preprocessor directive causes the compiler to replace that line with the entire text of the contents of the named source file (if included in quotes: "") or named header (if included in angle brackets: <>).

3. List of C/C++ Header files.

<cassert> (assert.h) C Diagnostics Library (header)

<cctype> (ctype.h) Character handling functions (header)

<cerrno> (errno.h) C Errors (header)

<cfenv> (fenv.h) Floating-point environment (header)

<cfloat> (float.h) Characteristics of floating-point types (header)

<cinttypes> (inttypes.h) C integer types (header)

<ciso646> (iso646.h) ISO 646 Alternative operator spellings (header)

<climits> (limits.h) Sizes of integral types (header)

<clocale> (locale.h) C localization library (header)

<cmath> (math.h) C numerics library (header)

<csetjmp> (setjmp.h) Non local jumps (header)

<csignal> (signal.h) C library to handle signals (header)

<cstdarg> (stdarg.h) Variable arguments handling (header)

<cstdbool> (stdbool.h) Boolean type (header)

<cstddef> (stddef.h) C Standard definitions (header)

<cstdint> (stdint.h) Integer types (header)

<cstdio> (stdio.h) C library to perform Input/Output operations (header)

<cstdlib> (stdlib.h) C Standard General Utilities Library (header)

<cstring> (string.h) C Strings (header)

<ctgmath> (tgmath.h) Type-generic math (header)

<ctime> (time.h) C Time Library (header)

<cuchar> (uchar.h) Unicode characters (header)

<cwchar> (wchar.h) Wide characters (header)

<cwctype> (wctype.h) Wide character type (header)

A Java Program to Convert Celsius to Fahrenheit.

2015-01-17T09:45:00.000+05:30

Hey Guy's!!!!

Welcome once again.It's Parth Patel here.In this tutorial we are going to make a Temperature converter which can convert Celsius to Fahrenheit.In this program we are extending JFrame . For that we are going to use 2 Buttons,2 TextFields,2 Labels and 4 Panels.

b1,b2----------2 Buttons

l1,l2---------- 2 Labels

t1,t2---------- 2 TextFields

p1,p2,p3,p4---------- 4 Panels

p1 is the main panel which is added into the center of border layout.And then p1's layout is set to grid layout of 3x1.Then p2,p3,p4 are added to p1 layout.

Let's start Programming!!!!

* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package temperatureconvertor;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

/**
*
* @author Parth
*/

class MyFrame extends JFrame implements ActionListener
{
JButton b1,b2;
JLabel l1,l2;
JPanel p1,p2,p3,p4;
JTextField t1,t2;

MyFrame()
{
b1= new JButton("Convert");
b2= new JButton("Reset");
l1= new JLabel("Celsius");
l2= new JLabel("Fahrenheit");
p1= new JPanel();
p2= new JPanel();
p3= new JPanel();
p4= new JPanel();
t1= new JTextField(10);
t2= new JTextField(10);
add(p1,BorderLayout.CENTER);
p1.setLayout(new GridLayout(3,1));
p1.add(p2);
p1.add(p3);
p1.add(p4);
p2.setLayout(new GridLayout(1,2));
p3.setLayout(new GridLayout(1,2));
p4.setLayout(new GridLayout(1,2));
p2.add(l1);
p2.add(t1);
p3.add(l2);
p3.add(t2);
p4.add(b1);
p4.add(b2);
b1.addActionListener(this);
b2.addActionListener(this);
t2.setEditable(false);
}

public void actionPerformed(ActionEvent e) {
String s = e.getActionCommand();
if(s.equals("Convert"))
{
String s1=t1.getText();
int n= Integer.parseInt(s1);
float f;
f=32+(5*n)/9;
t2.setText(f+"");
}
else
{
t1.setText(null);
t2.setText(null);

}
throw new UnsupportedOperationException("Not supported yet.");
}
}

class Demo
{
public static void main(String arg[])
{
MyFrame mf =new MyFrame();
mf.setSize(300,150);
mf.setVisible(true);

}
}

A Video tutorial to learn how to connect NetBeans IDE with Wamp Server.

2015-01-13T16:41:00.001+05:30

Hey Guys!!!

Are u a programmer and having trouble in connecting a wamp server database with NetBeans IDE.Don't worry here is the solution in this video

In this tutorial i have shown a step by step procedure to connect Wamp Server database with Netbeans IDE.If ou have any query comment below.I will help you with your problem.

A Java Program to make a simple calculator.

2015-01-12T10:21:00.001+05:30

Hey Guys!!! Welcome once again.It's Parth here.In this tutorial we are going to make a simple calculator which can perform addition,subtraction,multiplication,and division operation.For that you need 4 buttons,2 text field to insert input to the calc and a label to print the calculated input.I have used grid layout of 4X4.Here i have used the pannel of 300px X 300px, you can use your own size.

Let's start to program the calculator.

import java.awt.*;

import java.awt.event.*;

class MyFrame extends Frame implements ActionListener

{

Button b1,b2,b3,b4;

TextField t,tx;

Label l;

int n;

MyFrame()

{

t = new TextField(10);

tx = new TextField(10);

b1= new Button("+");

b2= new Button("-");

b3= new Button("*");

b4= new Button("/");

l = new Label("Ans");

setLayout(new GridLayout(4,4));

add(t);

add(tx);

add(b1);

add(b2);

add(b3);

add(b4);

add(l);

b1.addActionListener(this);

b2.addActionListener(this);

b3.addActionListener(this);

b4.addActionListener(this);

}

public void actionPerformed(ActionEvent e)

{ String a=t.getText();

int n1=Integer.parseInt(a);

String b=tx.getText();

int n2=Integer.parseInt(a);

String s=e.getActionCommand();

if(s.equals("+"))

{

n=n1+n2;

}

else if(s.equals("-"))

{

n=n1-n2;

}

else if(s.equals("*"))

{

n=n1*n2;

}

else if(s.equals("/"))

{

n=n1/n2;

}

l.setText(n+" ");

}

class Demo

{

public static void main(String args[])

{

MyFrame a=new MyFrame();

a.setSize(300,300);

a.setVisible(true);

}

Output of this program is same as the above image.If you have any query comment below.

A video tutorial to create database in wamp server.

2015-01-11T13:41:00.000+05:30

A video tutorial to create a database named abc in the wamp server and a table named abc in the wamp server.

A Video tutorial to learn how to install Wamp Server laptop or desktop

2015-01-11T11:58:00.002+05:30

A video tutorial to learn how to install wamp server on your laptop or desktop pc.