INNOVATIVE TUTORIALS

JAVA PROGRAM TO CHECK STRING PALINDROME

noreply@blogger.com (PK) — Thu, 12 Feb 2015 21:13:00 +0000

Program Statement: Write a JAVA program to check given string is palindrome or not.

Tested on:

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
import java.util.*;
public class StringPalindrome {
    public static void main(String[] args)
    {
        Scanner sn=new Scanner(System.in);
        System.out.println("Enter any string: ");
        String str=sn.next();
        StringBuffer sb = new StringBuffer(str);
            sb.reverse();

        if(str.equals(sb.toString()))
            System.out.println("The given string "+str+" is a palindrome");
        else
            System.out.println("The given string "+str+" is not a palindrome");

    }
}

Output

Enter any string:
madam
The given string madam is a palindrome

Enter any string:
cat
The given string cat is not a palindrome

JAVA PROGRAM TO DEMONSTRATE RUNTIME POLYMORPHISM

noreply@blogger.com (PK) — Thu, 12 Feb 2015 21:08:00 +0000

Program Statement: Write a JAVA program to demonstrate runtime polymorphism.

Tested on:

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
abstract class Shape
{
    abstract void area();
}
class Rectangle extends Shape
{
    @Override
    void area()
    {
    int l=10,b=20;
    System.out.println("The area of rectangle is:"+l*b);
    }
}
class Square extends Shape
{
    void area()
    {
        int l=10;
        System.out.println("The area of square is:"+l*l);
    }
}
public class RuntimePolymorphism
{

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
    Shape s;
    Rectangle r=new Rectangle();
    Square s1=new Square();
    s=r;
    s.area();
    s=s1;
    s.area();

    }

}

Output

The area of rectangle is:200
The area of square is:100

JAVA PROGRAM TO DEMONSTRATE SIMPLE JAVA APPLET

noreply@blogger.com (PK) — Thu, 12 Feb 2015 20:57:00 +0000

Program Statement: Develop an applet that displays a simple message.

Tested on:

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
import java.applet.*;
import java.awt.*;
/*<applet code="SimpleApplet" width=500 height=500> </applet> */
public class SimpleApplet extends Applet
{
public void init()
{
    setForeground(Color.RED);
    setBackground(Color.BLUE);
}

public void paint(Graphics g)
{
    Font f=new Font("Arial",Font.ITALIC,20);
    g.setFont(f);
    g.drawString("Welcome to Applet Programming!",50,50);
}
}

Output

JAVA APPLET PROGRAM TO SIMULATE TRAFFIC LIGHTS

noreply@blogger.com (PK) — Thu, 12 Feb 2015 20:50:00 +0000

Program Statement: Write a JAVA program that simulates a traffic light. The program lets the user select one of the three lights: red, yellow, green. When a radio button is selected, the light is turned on, and only one light can be on at a time. No light is on when the program starts.

Tested on:

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
/* <applet code="TrafficLights" width=500 height=500> </applet> */
public class TrafficLights extends Applet implements ItemListener
{
    CheckboxGroup cbg;
    Checkbox r,g1,y;
    public void init()
    {
        cbg=new CheckboxGroup();
        r=new Checkbox("Red",cbg,false);
        g1=new Checkbox("Green",cbg,false);
        y=new Checkbox("Yellow",cbg,false);
        r.addItemListener(this);
        g1.addItemListener(this);
        y.addItemListener(this);
        add(r);
        add(g1);
        add(y);
    }
    public void itemStateChanged(ItemEvent ie)
    {
        repaint();
    }
    public void paint(Graphics g)
    {
        if(cbg.getSelectedCheckbox()==r)
        {
            g.setColor(Color.red);
            g.fillOval(150, 125,70,70);
        }
        if(cbg.getSelectedCheckbox()==g1)
        {
            g.setColor(Color.green);
            g.fillOval(150, 125,70,70);
        }
        if(cbg.getSelectedCheckbox()==y)
        {
            g.setColor(Color.yellow);
            g.fillOval(150, 125,70,70);
        }
    }
}

Output

JAVA APPLET PROGRAM FOR HANDLING MOUSE EVENTS

noreply@blogger.com (PK) — Thu, 12 Feb 2015 20:37:00 +0000

Program Statement: Write a JAVA applet program for handling Mouse Events.

Tested on:

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
import java.applet.*;
import java.awt.event.*;
import java.awt.*;
public class MouseHandling extends Applet implements MouseListener, MouseMotionListener
{
    String msg="";
public void init()
{
    addMouseListener(this);
    addMouseListener(this);

}
public void mouseEntered(MouseEvent me)
{
    setBackground(Color.RED);
    msg="Mouse Entered";
    showStatus("Mouse Entered at:"+me.getX()+","+me.getY());
    repaint();
}
public void mouseExited(MouseEvent me)
{
    setBackground(Color.WHITE);
    msg="Mouse Exited";
    showStatus("Mouse Exited"+me.getX()+","+me.getY());
    repaint();
}
public void mouseDragged(MouseEvent me)
{
setBackground(Color.RED);
    msg="Mouse Dragged";
    showStatus("Mouse Dragged at:"+me.getX()+","+me.getY());
    repaint();
}
public void mousePressed(MouseEvent me)
{

}
public void mouseReleased(MouseEvent me)
{

}
public void mouseClicked(MouseEvent me)
{
setBackground(Color.RED);
    msg="Mouse Clicked";
    showStatus("Mouse Clicked at:"+me.getX()+","+me.getY());
    repaint();
}
public void mouseMoved(MouseEvent me)
{
    setBackground(Color.RED);
    msg="Mouse moved";
    showStatus("Mouse Moved at:"+me.getX()+","+me.getY());
    repaint();
}
public void paint(Graphics g)
{
    g.drawString(msg,30,30);
}

}

Output

JAVA PROGAM TO COMPUTE nxn MATRIX MULTIPLICATION

noreply@blogger.com (PK) — Thu, 12 Feb 2015 20:30:00 +0000

Program Statement: Write a JAVA program to compute Matrix Multiplication.

Tested on:

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
import java.util.*;
class Multiplication
{
    int[][] mul(int x[][],int y[][],int z[][],int m,int n,int p,int q)
    {

    for(int r=0;r<m;r++)
        {
    for(int c=0;c<n;c++)
            {
        z[r][c]=0;
        for(int k=0;k<p;k++)
            z[r][c]=z[r][c]+x[r][k]*y[k][c];

            }
        }

     return z;
    }

}
class Matrixmul
{
    public static void main(String[] args)
    {
        System.out.println("\n Enter the number or rows and columns in matrix A:\n");
        Scanner sn=new Scanner(System.in);
        int m=sn.nextInt();
        int n=sn.nextInt();
        int result[][]=new int[m][n];
        int A[][]=new int[m][n];
        System.out.println("Enter elements into matrix A:\n");
        for(int r=0;r<m;r++)
        for(int c=0;c<n;c++)
        A[r][c]=sn.nextInt();
        System.out.println("Enter the number or rows and columns in matrix B:\n");
        int p=sn.nextInt();
        int q=sn.nextInt();
        int B[][]=new int[p][q];
        System.out.println(" Enter elements into matrix B:\n");
        for(int r=0;r<p;r++)
        for(int c=0;c<q;c++)
        B[r][c]=sn.nextInt();
        Multiplication obj=new Multiplication();
        if(n==p)
        {

        obj.mul(A,B,result,m,n,p,q);
        for(int r=0;r<m;r++)
            {
        for(int c=0;c<n;c++)
                {
            System.out.print(result[r][c] +"\t");
                }
                System.out.print("\n");
            }
        }
            else
        System.out.println(" Matrix Multiplication Not Possible.");

    }
}

Output

Enter the number or rows and columns in matrix A:

3 3
Enter elements into matrix A:

1 2 3
4 5 6
7 8 9
Enter the number or rows and columns in matrix B:

3 3
Enter elements into matrix B:

1 2 3
6 7 8
4 5 6

25   31   37
58   73   88
91   115   139

JAVA APPLET PROGRAM TO HANDLE DIVIDE BY ZERO EXCEPTION

noreply@blogger.com (PK) — Thu, 12 Feb 2015 20:24:00 +0000

Program Statement: Write a program that creates a user interface to perform integer divisions. The user enters two numbers in the text fields,
Num1 and Num2. The division of Num1 and Num2 is displayed in the Result field when the Divide button is clicked. If Num1 and Num2 were not an integer, The program would throw a NumberFormatException. If Num2 were zero, the program would throw ArithmeticException. Display the Exception in a message dialog box.

Tested on

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
/* <applet code="DivideDemo" width=500 height=500> </applet? */

public class DivideDemo extends Applet implements ActionListener,TextListener
{
Label l1,l2,l3;
TextField t1,t2,t3;
Button b1;
int x,y;
float res=0;
public void init()
{
    l1=new Label("Num1:");
    l2=new Label("Num2:");
    l3=new Label("Num3:");
    t1=new TextField(10);
    t2=new TextField(10);
    t3=new TextField(10);
    b1=new Button("Display");
    add(l1);
    add(t1);
    add(l2);
    add(t2);
    add(b1);
    add(l3);
    add(t3);
    b1.addActionListener(this);
    t1.addTextListener(this);
    t2.addTextListener(this);
}
   public void actionPerformed(ActionEvent ae)
   {
       try
       {
           int x=Integer.parseInt(t1.getText());
           int y=Integer.parseInt(t2.getText());
           if(ae.getSource()==b1)
             res=x/y;
       }
       catch(NumberFormatException nfe)
       {
           javax.swing.JOptionPane.showMessageDialog(this, "Please enter Integer value");
       }
       catch(ArithmeticException afe)
       {
           javax.swing.JOptionPane.showMessageDialog(this,"Please enter non-zero value");
       }
       t3.setText(String.valueOf(res));
   }
   public void textValueChanged(TextEvent te)
   {
       if(!t1.getText().equals("")&&(!t2.getText().equals("")))
       {
           b1.setEnabled(true);

       }
       else
           b1.setEnabled(false);

   }
}

Output

JAVA APPLET PROGRAM TO CALCULATE FACTORIAL

noreply@blogger.com (PK) — Thu, 12 Feb 2015 20:11:00 +0000

Program Statement: Develop an applet that receives an integer in one text field, and computes its factorial value and returns it in another text field, when the button named "Compute" is clicked.

Java Program Image

Tested on:

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
import java.applet.*;
import java.awt.event.*;
import java.awt.*;
/*<applet code="Factorial" width=500 height=500> </applet> */
public class FactorialApplet extends Applet implements ActionListener
{
Label l1,l2;
TextField t1,t2;
Button b1,b2;
public void init()
{
      l1=new Label("Enter a value: ");
      l2=new Label("Result:");
      t1=new TextField(10);
      t2=new TextField(10);
      b1=new Button("Calculate");
      b2=new Button("Clear");
      add(l1);
      add(t1);
      add(b1);
      add(b2);
      add(l2);
      add(t2);
      b1.addActionListener(this);
      b2.addActionListener(this);
}
public void actionPerformed(ActionEvent ae)
{
      int n=Integer.parseInt(t1.getText());
      int fact=1;
      if(ae.getSource()==b1)
      {
          if(n==0||n==1)
          {
              fact=1;
          t2.setText(String.valueOf(fact));
          }
          else
          {
          for(int i=1;i<=n;i++)
              fact=fact*i;
          }
     t2.setText(String.valueOf(fact));
      }
      else if(ae.getSource()==b2)
      {
          t1.setText("");
          t2.setText("");
      }

}
}

Output

JAVA PROGRAM TO FIND ROOTS OF A QUADRATIC EQUATION

noreply@blogger.com (PK) — Thu, 12 Feb 2015 20:01:00 +0000

Program Statement: Write a JAVA program to find roots of a Quadratic Equation. If Discriminant is negative, display a message stating that there are no real solutions.

Java Program Image

Tested on:

Software: Windows 8, Jdk 1.6, Netbeans IDE

Hardware: Intel Core i3, 4 GB RAM, 500 GB HDD

Source Code

@Author: Praveen Kanwar
import java.util.*;
class QuadraticRoots
{
   public static void main(String[] args)
    {
        int a,b,c,d;
        Scanner sn=new Scanner(System.in);
        System.out.println("Enter a,b,c values: ");
        a=sn.nextInt();
        b=sn.nextInt();
        c=sn.nextInt();
        d=b*b-4*a*c;
        if(d>0)
        {
            System.out.println("Roots are real and distinct");
            System.out.println("Roots are:");
            double r1=((-b)+Math.sqrt(d))/(2*a);
            double r2=((-b)-Math.sqrt(d))/(2*a);
            System.out.println("r1= "+r1);
            System.out.println("r2= "+r2);


        }
        else if(d==0)
        {
             System.out.println("Roots are real and equal");
            System.out.println("Roots are:");
            double r1=(-b)/(2*a);
            double r2=(-b)/(2*a);
            System.out.println("r1= "+r1);
            System.out.println("r2= "+r2);
        }
        else
            System.err.println("Roots are imaginary!");
    }
}

Output

CASE 1:
Enter a,b,c values:
1 2 3
Roots are imaginary!
CASE 2:
Enter a,b,c values:
1 5 6
Roots are real and distinct
Roots are:
r1= -2.0
r2= -3.0

BIT STUFFING IN JAVA WITH SOURCE CODE AND DESCRIPTION

noreply@blogger.com (PK) — Sat, 03 Jan 2015 13:39:00 +0000

Bit Stuffing is one of the framing technique used in Data-Link Layer (layer 2) of OSI Reference Model.
In Bit-Stuffing technique, stuffing is done at the bit level. It was developed for the once very popular HDLC(High-Level Data Link Layer) protocol. Each frame begins and ends with a special bit pattern 01111110 or 0x7E in hexadecimal. This pattern is a flag byte.

"Whenever the sender's data link layer encounters five consecutive 1s in the data, it automatically stuffs a 0 bit into the outgoing bit stream"
"Whenever the receiver sees five consecutive incoming 1 bits, followed by a 0 bit, it automatically destuffs (i.e, deletes) the 0 bit."

For Example:

If the user data contain the flag pattern, 01111110, this flag is transmitted as 011111010 but stored in the receiver's memory as 01111110, as shown in fig below:

fig.a) Original Data. b) Stuffed Data. c) Received Data

Source Code

import java.util.*;

public class SEFBS

{

public static void main(String[] args)

{

System.out.print("Enter the Binary message: ");

Scanner sn=new Scanner(System.in);

String data = sn.nextLine();

String res = new String();

String out=new String();

int counter = 0;

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

{

if (data.charAt(i)!='1' && data.charAt(i)!='0')

{

System.out.println("Enter only Binary values!!!");

return;

}

if(data.charAt(i) == '1')

{

counter++;

res = res + data.charAt(i);

}

else

{

res = res + data.charAt(i);

counter = 0;

}

if(counter == 5)

{

res = res + '0';

counter = 0;

}

String inc="01111110"+res+"01111110";

System.out.println("The Message to be transfered: " +inc);

System.out.println("Seding Message....");

counter=0;

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

{

if(res.charAt(i) == '1')

{

counter++;

out = out + res.charAt(i);

}

else

{

out = out + res.charAt(i);

counter = 0;

}

if(counter == 5)

{

if((i+2)!=res.length())

out = out + res.charAt(i+2);

else

out=out + '1';

i=i+2;

counter = 1;

}

System.out.println("Message Recevied...Successfully!!!");

System.out.println("The Destuffed Message is: "+out);

}

Output

C PROGRAM TO COUNT CHARACTER, WORDS AND LINES

noreply@blogger.com (PK) — Sat, 03 Jan 2015 12:37:00 +0000

This C program counts number of characters, number of words and number of lines in a given text.

Program Description

Variables: nw-new word, nc-new character, nl-new line
ch-to store character.
getchar(): scans one character from keyboard and stores it in variable 'ch'.
Then it compares with character '#'.It will scan till the condition become false.

While loop: Inside the while loop,

1) If the scanned character is space, then new word and new character are incremented by 1.

2) If the scanned character is new line( means 'enter' is pressed), then new line and new word are increased by 1.

3) If the scanned character is character then new character is increased by 1.

Finally print nl, nw, nc.

Source Code

/* program that counts number of lines, words and characters
Note: Don't forget to put '#' at the end of your text */

#include<stdio.h>
#include<conio.h>
void main()
{
int nw,nc,nl;
char ch;
clrscr();
nl=1;//new line
nw=0;//new word
nc=0;//new character
printf("\n Enter any text:\n");
while((ch=getchar())!='#')
{
if(ch==' ')
{
nw=nw+1;
nc=nc+1;
}
else if(ch=='\n')
{ nl=nl+1;
nw=nw+1;
}
else
{ nc=nc+1;
}
}
printf("\n Number of lines: %d",nl);
printf("\n Number of characters: %d",nc);
printf("\n Number of words: %d",nw);
getch();
}

Output

CREATE START BUTTON IN WINDOWS 8

noreply@blogger.com (PK) — Wed, 31 Dec 2014 12:07:00 +0000

Hi friends! I am back again with a tutorial to create start button in windows 8. When i switched into windows 8 from windows 7, i was totally shocked for the first time because i was unable to locate my start button! Although windows OS has friendly user interface then another OS, i felt very uneasy to use windows 8 because i was missing my Start Button! Windows 7 and Previous versions were made to run on more traditional computers such as laptops, desktops,or notebooks, Windows 8 and later OS are made to run on a wider variety of devices. It can also be used

successfully on tablets, computers with touch screens, and hybrids that combine the versatility of a laptop with the mobility of a tablet and cellphones. And If everything would start with start button then it would create problems for small devices. So, Microsoft decided to remove Start Button and Make use of Start Screen. But when it comes to habit of using Start Button most of the windows users feel difficult to locate it though there is secret Start Menu at the left bottom corner of the screen. Microsoft lopped off the Start menu in Windows 8 to force people to use the Start screen. And I'll admit it, the Start screen does offers several benefits. For those users who don't want to go for windows 8.1 and 10 (Start Button is back in 8.1 and 10) and want back their start button into their task-bar in windows 8 follow the following steps:

1. Right click on desktop and Goto new and shortcut.

2. Create Shortcut Dialog box will appear, in the text area copy paste the following code:

explorer.exe shell:::{2559a1f8-21d7-11d4-bdaf-00c04f60b9f0}

and click on Next.

3.Type name for the shortcut as "START" without quotes.

4. Click on finish.

Now you will see a shortcut on your desktop with name START.

5. Change the icon by right-click>>properties>>change icon.
(You can download windows 8 logo for start button)

6. Again, Right-click on it and click pin to taskbar and click and drag it to relocate its proper position in the taskbar.

To get start menu like windows 7 style click here...

(Note: Once you choose the icon please do not change the location of your icon otherwise it will show image error!)

HOW TO MAKE AN INVISIBLE FOLDER ON DESKTOP?

noreply@blogger.com (PK) — Tue, 30 Dec 2014 14:57:00 +0000

Hello friends. Every computer user whether he/she is a frequent or occasional user, whether he/she is a professional or general user wants to make his/her important files secret or in other words, he/she doesn't want her files to be accessed by someone else. So, what if you could make an invisible folder that can contain all your files? Do you think is it possible? Yes, of course! you can.

Actually this is very classical and old trick for hiding your file and no doubt you must be knowing. But, there may be many user who doesn't know about this trick. And this trick doesn't require any software to be installed and used. As you all know that i wanna make most of the things working without any software because i believe that most of the things can be done with tricks and with limited resources and moreover I answer first 'what if' then I go for 'how'. I mean to say 'What if you don't have any software and wanna hide your files rather than how to hide files with software'.
So lets begin:

Steps

1. Create a New folder.

2. Press F2 to rename.

3. Press Alt+0160 or Alt+255 from the Number Pad of the keyboard. (NOTE: 0160 or 255 must be entered from Numberpad of the keyboard, otherwise it will not work )

Also see: How to hide any file behind jpeg image without software?

4. Miracle! Now the folder name is invisible. Just change the icon of the folder (goto: Folder properties->customize->change icon and choose an empty icon.

5. Now your folder is totally invisible. Put your Mouse Pointer over the folder you will see that the folder is there but it is invisible. Now drag and keep it any where in your desktop area!!

Attention! This method is not for highly confidential information. This is neither secure nor lasts for longer time because when you hover your mouse pointer over the folder area, it can be easily notified. Its just for temporary hiding for shorter period unless it can get into someone's notice! Try and Enjoy it. Thank you.

MOST FREQUENTLY ASKED QUESTIONS IN ETHICAL HACKING

noreply@blogger.com (PK) — Mon, 24 Nov 2014 17:53:00 +0000

1. What is hacking?

Ans: Technically, Hacking is an art of exploring uncommon things or modifying things to achieve uncommon functionalities.
In other words, Hacking is an act of penetrating computer system to gain knowledge about the system and how it works.

2. Who are hackers or Ethical hackers?

Ans: A Hacker is a person who is extremely interested in exploring the things and recondite workings of any computer system or networking system. Most often, hackers are the expert programmers. These are also called Ethical Hackers or white hat hackers. And the technique or hacking they perform is called ethical hacking.
Ethical Hacking Means you think like Hackers that is first you Hack the Systems and find out the loop holes and then try to correct those Loop Holes. These types of hackers protect the cyber world from every possible threat and fix the future coming security loop holes. These peoples are also called as "GURU's" of Computer Security.

3. Who are Crackers?

Ans: Crackers or Black Hat hackers or cheaters or simply criminals, they are called criminals because they are having the mindset of causing harm to security and they steals very useful data and use it in wrong ways.
Phishers also come in this category who steals account info and steal your credit card nos. and money over the Net.

4. How hackers are different from crackers?

Ans: Hackers are good guys and Crackers are bad guys in the field of hacking.

5. Who is script kiddy?

Ans: A Script Kiddy is a novice hacker or hacker at very beginner level who lacks the knowledge of how different stuffs works and use easy technique and ready-made tools to attempt hacking.

6. what is ethical hacking?

Ans: The term Ethical Hacking refers to the co-ordinate and comprehensive check of security of a network and on systems inside it, in order to assess the actual risk level data is exposed to, and to propose possible corrective actions aimed at raising the security level.

7. Skills of Ethical hackers?

Ans:

Has in-depth knowledge of target platforms, such as Windows, Unix, Linux etc.
Has exemplary knowledge of networking and related hardware and software
Has knowledge of security areas and related issues
Has "High technical" knowledge to launch sophisticated attacks

Any many more....

HOW TO HIDE ANY FILE BEHIND JPEG IMAGE (WITHOUT ANY STEGANOGRAPHY SOFTWARE)?

noreply@blogger.com (PK) — Mon, 24 Nov 2014 17:20:00 +0000

In Bhagavad Gita, Lord Sri Krishna said to Arjuna that what all appearing to be real was just an Illusion (Maya). Due to advancement in the information technology,the same is applicable in today's world. Steganography made it possible.

So, here a question may arise,

What is Steganography?

Actually, Steganography is an art of hiding data behind images so that only the intended recipients can read the message being sent. Basically, this kinds of techniques are applied when the sending and receiving party want their information to be highly confidential, such that no third party person can read or modify them.

Again, you might be wondering how to implement Steganography to our information to be sent? And believe me, this question is very common! There are so many S-tools available to hide data behind images for example nettools.

But, Consider a situation where you want to send a secret information but you don't have Steganography software in your PC.So, the question is- Is it possible to implement Steganography without Software? The answer is yes! We can implement it without any Steganogaphic Software. And you are at the right place to learn it. So, without any delaying, lets start our tutorial.

We need to have the following requirements which are very common and generally available in every PC.

Requirements:

1. Winrar (any version) installed in your PC.

2. Little Knowledge in command prompt.

Procedures:

TO HIDE:

1. Create a folder into C: drive (you can use any drive as your wish) having name "hidden" such that location of the folder is C:\hidden

2. Now gather all the files that you want to hide inside this folder as shown in screenshot below:

3. Compress all the files using winrar (Eg: "myhiddenfiles.rar")
Note: This file also should be in the same folder "hidden"

4.Now select any jpeg image that you want to use to hide your files, and put it into the same folder.

5.Goto Run-> and type cmd and make sure that your working directory is "C:\hidden" if not then change it.

6. After that, just type the following code:

Copy /b myimage.jpg+myhiddenfiles.rar outputimage.jpg

As shown in screenshot below:

Now, Understand the code:
Here, myimage.jpg is the name of your jpeg image, myhiddenfiles.rar is the file that you have created using winrar and outputimage.jpg is your output image file after hiding your files.

7. Now its all completed, you will see a file named outputimage.jpg in the same folder, open it you will see only your image that you want to show but still it contains your hidden files in it.

8. Now its 100% ready to send via network.

TO UNHIDE:

1. To get your hidden files just change the extension of your outputfile.jpg to outputfile.rar and extract it using winrar again. You can see your hidden files.

I hope you enjoyed this tutorial.
Thank you!

Extend your C drive without formatting in windows

noreply@blogger.com (PK) — Fri, 21 Nov 2014 18:52:00 +0000

It is very common problem seen that the allocated space for the system drive(most commonly C: drive) is insufficient to install more number of software because system drive may run out of memory! And this is very true with latest versions of Windows. Windows Xp used to take very less Memory on the drive but Windows 7, 8 and windows 10 will certainly take more space with lots of daily updates.Then, what to do? Shall we install our remaining program to another drive? No, not at all! if we do so then everything will be messy! So, lets see then how to extend our C drive by taking extra empty space from other drives.

CASE STUDY: As you can see in the screenshot below that my system drive has only 3.41 GB free of 46 GB and marked with red color! Now I am going to extend it to 92 GB by adding some space from other drive by using a tool called MINITOOL PARTITION WIZARD HOME ADDITION V8.1.1 click here to download.

Why am I using this tool instead there is inbuilt features in windows to extend my drive? Simple answer- windows provides extending feature only when the adjacent drive is free! but by using this tool we can use non adjacent drive's free space too!
Now i think it is better to start our work:

Step 1: Download MINITOOL PARTITION WIZARD HOME ADDITION V8.1.1 and install it.

Step 2: Double Click on the icon and you will see the following screen:

Step 3: Now choose C drive from the disk lists and on left-side panel there is an extend partition option click on it.

step 4: you will see the following screen:

This is the most important step. Chose any drive from the drop down menu from which you want to take the free space.
and the slide control allows you to choose the amount of space to be added.( here i am taking space from my D drive because of my own reason but you can choose any drive)
Step 5: Click on OK! And at the top-left corner click on apply option. Then your C drive will be extended without formatting!

Note: It is always a good habit of making a backup of your drive from which you are taking free memory space before proceeding. So, take precautionary action yourself to avoid any data loss!

Thank you!

Create Beautiful Horizontal Navigation Bar with Adobe Dreamweaver CS6 and Adobe Photoshop CS3

noreply@blogger.com (PK) — Fri, 21 Nov 2014 18:28:00 +0000

Creating Menu Bar for a Website Using Adobe Photoshop CS3 and Adobe Dreamweaver CS6 - A Menu bar is a very crucial part of any website. The prime aim of any website is to provide much more information about an organization to its customers or visitors. To provide flexibility in navigating through the pages of any website, there must be well structured, charming and beautiful navigation bar. If it is ambiguous and unstructured it may leads to the following problems:

1. Visitors cannot navigate through your website properly

2. Less Visitors means less traffic

3. Less traffic means your website is almost Dead

4. High chance of Google AdSense rejection because Google strictly examines

your website layout and structure, and no doubt menu bar is a part of it!

So, today in this tutorial we are going to see about creating a horizontal navigation bar. There are several ways to create it like by using JavaScript, CSS, and normal HTML coding etc. But, I am going to use my favorite and mostly preferred method which uses a rollover image technique. We will see Step-By-Step process with Screen Shots.

Requirements:

Adobe Photoshop (any version), Adobe Dreamweaver (any version) and a browser (any) to test it.

Settings:

Create a folder named Menu bar on your desktop and two more folder inside it named-Background and foreground.

Procedure:

In Adobe Photoshop:

1. Open an Adobe Photoshop, Create a new document of dimensions: width: 800 px, height: 50 px, resolution: 72 px/inch, background: white

2. Unlock the layer by double-clicking it. And Select slice tool, right click on your document anywhere and select divide Slice option. A dialog box will appear, in there select divide vertically into option and enter the number of slices you want to make (I am giving 7) and click on ok.

3. Now add some text on each slice by selecting text tool as shown in image below:

4. Search for fx icon on the bottom-left corner and at the bottom of the layers window and click on it and select Gradient Overlay option.

5. A dialog box will appear. And in opacity option decrease it to 15 % or input it in a box as shown in image below:

6. Now go to File menu and select save for web and devices option. Again a new dialog will appear in preset box select JPEG-High option and click on save. To save it browse to the Menu bar folder on your desktop and save it inside foreground folder inside it as shown in image below:

7. Again, go to fx and to Gradient Overlay option and this time increase the opacity % to 25 % as in image below:

8. Save it as before with same setting but this time in a background folder as shown in image below:

In Adobe Dreamweaver:

1. Open Adobe Dreamweaver and create a new site before proceeding to get all the resources into it. To create new site- Go to Site Menu>>New Site. A dialog will appear. In site Name Box give any name and in Local site box browse your menubar folder form your desktop.

Now you will see all the items into Dreamweaver.

2. Now create new html document. And insert Div Tag from Insert>>Layout Objects>>Div Tag. Another way is to select directly from the insert window at upper right corner as shown below:

3. A dialog will appear, in ID field enter Menubar and click on New CSS Rule just below it. A new dialog will appear just click on OK. Now you can see CSS rule dialog and enter the value as shown in the image below:

4. Click on OK. Now you can see following thing in your design view:

5. Now click on rollover option in an insert window or go to Insert Menu>>Image Objects>>Rollover Image. You will see the following dialog. Just browse the images as instructed in the image:

6. After adding all the images you will see the following navigation bar in your Dreamweaver working area. If you can’t see just click on Design to see design view.

7. Save the image as index.html

9. Double-click the index.html file where you have saved (here we will get it on our desktop). Or directly you can click on the Earth icon on the same horizontal line where you can get split,code view, Design view option. And select preview in browser.

10. After completing, your navigation bar will look like this:

Whenever you hover your mouse pointer over any menu elements, you will see some rollover image effects!

To watch video for this tutorial CLICK HERE>>

Thank You!

C PROGRAM TO IMPLEMENT PYRAMID OF NUMBERS

noreply@blogger.com (PK) — Thu, 20 Nov 2014 12:34:00 +0000

#include <stdio.h>
#include <conio.h>
void main()
{
int r,s,c;
clrscr();
for(r=1;r<=5;r++)
{
for(s=1;s<=(5-r);s++)
printf(" ");
for(c=1;c<=r;c++)
printf("%2d",r);
printf("\n");
}
getch();
}

output:
                      1
                     2 2
                    3 3 3
                   4 4 4 4
                  5 5 5 5 5