Thread Dead lock solution ?

package com.JavaInterview.Programs;

/** * 
 * @author:http://javainterviewprograms.blogspot.in/
 * 
 */

public class DeadlockSolution {

 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 (lock1) // to create deadlock use lock2 here

   /*

    * By interchanging locks position we have avoided deadlock

    * here(From creating deadlock example)

    */

   {

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

    try {

     Thread.sleep(20);

    } catch (InterruptedException e) {

    }

    System.out.println("Thread 2 : waiting for lock2 ...");

    synchronized (lock2)// to create deadlock use lock1 here

    {

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

    }

   }

  }

 }

}

Output:

Thread 1 :holding the lock1 ...

Thread 1 :waiting for lock 2....

Thread 1: holding lock1 and 2...

Thread 2 :holding the lock2

Thread 2 : waiting for lock2 ...

Thread 2 : holding both lock1 and 2..