TestThread.java

class ThreadDemo extends Thread {
 private Thread t;
 private String threadName;
 
 ThreadDemo( String name) {
 threadName = name;
 System.out.println("Creating " + threadName );
 }
 
 public void run() {
 System.out.println("Running " + threadName );
 try {
 for(int i = 4; i > 0; i--) {
 System.out.println("Thread: " + threadName + ", " + i);
 // Let the thread sleep for a while.
 Thread.sleep(50);
 }
 } catch (InterruptedException e) {
 System.out.println("Thread " + threadName + " interrupted.");
 }
 System.out.println("Thread " + threadName + " exiting.");
 }
 
 public void start () {
 System.out.println("Starting " + threadName );
 if (t == null) {
 t = new Thread (this, threadName);
 t.start ();
 }
 }
}

public class TestThread {

 public static void main(String args[]) {
 ThreadDemo T1 = new ThreadDemo( "Thread-1");
 T1.start();
 
 ThreadDemo T2 = new ThreadDemo( "Thread-2");
 T2.start();
 } 
}