DEAD LOCK Avoidence

import java.util.*;
public class SimpleDeadLock extends Thread
{
public static Object l1 = new Object();
public static Object l2 = new Object();
private int index;
public static void main(String[] a)
{
Thread t1 = new Thread1();
Thread t2 = new Thread2();
t1.start();
t2.start();
}
private static class Thread1 extends Thread
{
public void run()
{
synchronized (l1)
{
System.out.println("Thread 1: Holding lock 1...");
try
{
Thread.sleep(10);
}
catch (InterruptedException e)
{
}
System.out.println("Thread 1: Waiting for lock 2...");
synchronized (l2)
{
System.out.println("Thread 2: Holding lock 1 & 2...");
}
}
}
}

private static class Thread2 extends Thread
{
public void run()
{
synchronized (l2)
{
System.out.println("Thread 2: Holding lock 2...");
try
{
Thread.sleep(10);
}
catch (InterruptedException e)
{
}
System.out.println("Thread 2: Waiting for lock 1...");
synchronized (l1)
{
System.out.println("Thread 2: Holding lock2&1...");

}
}
}
}


OUTPUT:

Z:\jdk1.5\bin>javac SimpleDeadLock.java

Z:\jdk1.5\bin>java SimpleDeadLock
Thread 1: Holding lock 1...
Thread 2: Holding lock 2...
Thread 1: Waiting for lock 2...
Thread 2: Waiting for lock 1...