Thread life cycle and creation :JAVA Programming by "Gopal Krishna"

// by extending thread class

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();
}
}

// by implementig runnable 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();

}

}