Java programmes

Java break statement

public class JavaBreakExample

 {

public static void main(String[] args)

{

int intArray[] = new int[]{1,2,3,4,5};   

System.out.println("Elements less than 3 are : ");

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

{  

if(intArray[i] == 3)

break;

else

System.out.println(intArray[i]);

     }

   }

}

Java break statement with label

public class JavaBreakWithLableExample

{

public static void main(String[] args)

{

int[][] intArray = new int[][]{{1,2,3,4,5},{10,20,30,40,50}};

boolean blnFound = false;

System.out.println("Searching 30 in two dimensional int array..");

for(int intOuter=0; intOuter < intArray.length ; intOuter++)

{

for(int intInner=0; intInner < intArray[intOuter].length; intInner++)

{

if(intArray[intOuter][intInner] == 30)

{

blnFound = true;

break Outer;

}  

}

}

if(blnFound == true)

System.out.println("30 found in the array");

else

System.out.println("30 not found in the array");

   }

}

Switch Statement

public class SwitchStatementExample

{

public static void main(String[] args)

{

 switch(expression)

{

 break;

 case value2:

 default:

             break;

 }

for(int i=0; i <= 3 ; i++)

{

switch(i)

{

case 0:

System.out.println("i is 0");

break;

case 1:

System.out.println("i is 1");

break;

case 2:

System.out.println("i is 2");

break;

default:

System.out.println("i is greater than 2");

      }

   }

  }

}

Free Flowing Switch Statement

public class FreeFlowingSwitchExample

{

public static void main(String[] args)

{               

int i=0;

switch(i)

{

case 0:

System.out.println("i is 0");

case 1:

System.out.println("i is 1");

case 2:

System.out.println("i is 2");

                             

default:

System.out.println("Free flowing switch example!");

     }

   }

}

Nested Switch Statements

public class NestedSwitchExample

{

public static void main(String[] args)

{

int i = 0;

int j = 1;

             

switch(i)

{

case 0:

switch(j)

{

case 0:

System.out.println("i is 0, j is 0");

break;

case 1:

System.out.println("i is 0, j is 1");

break;

default:

System.out.println("nested default case!!");

}

break;

default:

System.out.println("No matching case found!!");

     }

   }

}

Free Flowing Switch Statement

public class FreeFlowingSwitchExample

{

 public static void main(String[] args)

{

int i=0;

switch(i)

{

case 0:

System.out.println("i is 0");

case 1:

System.out.println("i is 1");

case 2:

System.out.println("i is 2");

default:

System.out.println("Free flowing switch example!");

   }

  }

}

Get Horizontal Alignment of JLabel

import javax.swing.JApplet;

import javax.swing.JLabel;

public class GetHorizontalAlignmentExample extends JApplet

{

public void init()

{

JLabel label1 = new JLabel("JLabel Get Horizontal Alignment Example."); add(label1);

int alignment = label1.getHorizontalAlignment();

switch(alignment)

{

case JLabel.LEFT:

label1.setText("Left");

break;

case JLabel.CENTER:

label1.setText("Center");

break;

case JLabel.RIGHT:

label1.setText("Right");

break;

case JLabel.LEADING:

label1.setText("Leading");

break;

case JLabel.TRAILING:

label1.setText("Trailing");

break;

     }

   }

}

Set Vertical Alignment of JLabel

import javax.swing.JApplet;

import javax.swing.JLabel;

public class JLabelVerticalAlignmentExample extends JApplet

{

public void init()

{

JLabel label1 = new JLabel("JLabel Get Horizontal Alignment Example.");add(label1);

int alignment = label1.getVerticalAlignment();

switch(alignment)

{

case JLabel.LEFT:

label1.setText("Left");

break;

case JLabel.CENTER:

label1.setText("Center");

break;

case JLabel.RIGHT:

label1.setText("Right");

break;

case JLabel.LEADING:

label1.setText("Leading");

break;

case JLabel.TRAILING:

label1.setText("Trailing");

break;

     }

    }

  }

JTextField Horizontal Alignment

import java.awt.FlowLayout;

import javax.swing.JApplet;

import javax.swing.JTextField;

public class JTextFieldHorizontalAlignmentExample extends JApplet

{       

public void init()

{

this.getContentPane().setLayout(new FlowLayout());

JTextField field = new JTextField("JTextField Horizontal Alignment Example", 10);

int horizontalAlignment = field.getHorizontalAlignment();         

switch(horizontalAlignment)

{

       

case JTextField.LEFT:

field.setText("Left");

break;

case JTextField.RIGHT:

field.setText("Right");

break;

case JTextField.CENTER:

field.setText("Center");

break;

case JTextField.LEADING:

field.setText("Leading");

break;

case JTextField.TRAILING:

field.setText("Trailing");

break;

}

field.setHorizontalAlignment(JTextField.CENTER);

add(field);

   }

}

Do While loop

public class DoWhileExample

{

public static void main(String[] args)

{

dowhile();

nt i =0;  

do

{

System.out.println("i is : " + i);

i++;

}while(i < 5);

  }

}

Infinite For loop

public class InfiniteForLoop

 {

public static void main(String[] args)

{

   for(;;)

System.out.println("Hello");

  }

}

Java StringBuffer setLength

public class JavaStringBufferSetLengthExample

 {

public static void main(String[] args)

{

StringBuffer sbf = new StringBuffer("StringBuffer setLength method example");

sbf.setLength(12);

System.out.println("StringBuffer contents: " + sbf);

sbf.setLength(0);

System.out.println("StringBuffer contents deleted:" + sbf);

   }

}

Java String Buffer append new line

public class JavaStringBufferAppendNewLineExample

{      

public static void main(String args[])

{

StringBuffer sbf = new StringBuffer("This is the first line.");

sbf.append(System.getProperty("line.separator"));

sbf.append("This is second line.");

System.out.println(sbf);

    }

}

Java String Buffer to InputStream

import java.io.ByteArrayInputStream;

import java.io.InputStream;

public class StringBufferToInputStreamExample

{

public static void main(String args[])

{

 StringBuffer sbf = new StringBuffer("StringBuffer to InputStream Example");

byte[] bytes = sbf.toString().getBytes();

InputStream inputStream = new ByteArrayInputStream(bytes);

System.out.println("StringBuffer converted to InputStream");

   }

}

String Buffer Reset Java

public class StrinBufferResetExample

{

public static void main(String[] args)

{

StringBuffer sbf = new StringBuffer("Hello World!");

System.out.println("StringBuffer content: " + sbf) ;

sbf.delete(0, sbf.length());

System.out.println("StringBuffer content after reset:" + sbf);

  }

}

String Buffer toString

public class JavaStringBufferToStringExample

{

public static void main(String args[])

{

StringBuffer sbf = new StringBuffer("Hello World!");

String str = sbf.toString();

System.out.println("StringBuffer to String: " + str);

   }