Create Thread dead lock ?

package com.JavaInterview.Programs;
/**
 * Find Out Factorial of a number
 * 
 * @author:http://javainterviewprograms.blogspot.in/
 * 
 */

public class ThreadDeadlock {

 public static Object lock1 = new Object();

 public static Object lock2 = new Object();

 public static void main(String args[]) {

  Thread1 t1 = new Thread1();

  Thread2 t2 = new Thread2();

  t1.start();

  t2.start();

 }

 private static class Thread1 extends Thread {

  public void run() {

   synchronized (lock1) {

    System.out.println("Thread 1 :holding the lock1 ...");

    try {

     Thread.sleep(10);

    } catch (InterruptedException e) {

    }

    System.out.println("Thread 1 :waiting for lock 2....");

    synchronized (lock2) {

     System.out.println("Thread 1: holding lock1 and 2...");

    }

   }

  }

 }

 private static class Thread2 extends Thread {

  public void run() {

   synchronized (lock2) {

    System.out.println("Thread 2 :holding the lock2");

    try {

     Thread.sleep(20);

    } catch (InterruptedException e) {

    }

    System.out.println("Thread 2 : waiting for lock1 ...");

    synchronized (lock1) {

     System.out.println("Thread 2 : holding both lock1 and 2..");

    }

   }

  }

 }

}

Output :

Thread 2 :holding the lock2

Thread 1 :holding the lock1 ...

Thread 1 :waiting for lock 2....

Thread 2 : waiting for lock1.

...