Thread Simple programs

Program 1 :

public class thr1 extends Thread

{

public void run()

{

System.out.println("thread runing");

}

public static void main (String arg[])

{

thr1 x= new thr1();

x.start();

}

}

Program 2 :

// by implementig runable interface 

public class thr2 implements Runnable 

{

public void run()

{

System.out.println("thread runing");

}

public static void main (String arg[])

{

thr2 x= new thr2();

Thread t=new Thread(x);

t.start();

}

}

Program 3 :

public class thr3 extends Thread

{ int i;

public void run()

{

for (i=1;i<15;i++)

{

System.out.println(i);

try

{

Thread.sleep(1000);

}

catch(Exception e)

{

System.out.println(e);

}

}

}

public static void main (String arg[])

{

thr3 x= new thr3();

x.start();

}

}

Program 4 :

// sleep method

public class thr4 extends Thread

{ int i;

public void run()

{

for (i=1;i<10;i++)

{

System.out.println(i);

try

{

Thread.sleep(1000);

}

catch(Exception e)

{

System.out.println(e);

}

}

}

public static void main (String arg[])

{

thr3 x1= new thr3();

thr3 x2= new thr3();

thr3 x3= new thr3();

x1.start();

try

{

x1.join();

}

catch(Exception e)

{

System.out.println(e);

}

x2.start();

try

{

x2.join();

}

catch(Exception e)

{

System.out.println(e);

}

x3.start();

}

}