THIRD WEEK TERM WORK Program 5

5) Write a Java program that simulates deadlock condition using threads.

Program:

public class DeadLockThread {

   public static Object L1 = new Object();

   public static Object L2 = new Object();

   

   public static void main(String args[]) {

      ThreadDemo1 T1 = new ThreadDemo1();

      ThreadDemo2 T2 = new ThreadDemo2();

      T1.start();

      T2.start();

   }

   

   private static class ThreadDemo1 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 1: Holding lock 1 & 2...");

            }

         }

      }

   }

   private static class ThreadDemo2 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 lock 1 & 2...");

            }

         }

      }

   } 

}

OUTPUT-:

Thread 2: Holding lock 2...

Thread 1: Holding lock 1...

Thread 2: Waiting for lock 1...
Thread 1: Waiting for lock 2...

Credits :  Lakshmi And Swathi