Java/Deadlock.java at master · jaideepjaison/Java · GitHub

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import java.io.*;

class Thread1 implements Runnable {

     public Object obj1;

     public Object obj2;

     public Thread1(Object obj1, Object obj2) {

           this.obj1 = obj1;

           this.obj2 = obj2;

     }

     public void run() {

           while(true) {

                synchronized (obj1) {

                     System.out.println("Thread1 : obj1");

                     synchronized (obj2) {

                           System.out.println("Thread1 : obj2");

                     }

                }

           }

     }

}

class Thread2 implements Runnable {

     public Object obj1;

     public Object obj2;

     public Thread2(Object obj1, Object obj2) {

           this.obj1 = obj1;

           this.obj2 = obj2;

     }

     public void run() {

           while(true) {

                synchronized (obj2) {

                     System.out.println("Thread2 : obj2");

                     synchronized (obj1) {

                           System.out.println("Thread2 : obj1");

                     }

                }

           }

     }

}

public class DeadLock {

     public static void main(String args[]) throws InterruptedException {

           Object obj1 = new Object();

           Object obj2 = new Object();

           Thread2 runn2 = new Thread2(obj1, obj2);

           Thread1 runn1 = new Thread1(obj1, obj2);

           Thread thrd2 = new Thread(runn2);

           Thread thrd1 = new Thread(runn1);

           thrd1.start();

           thrd2.start();

           while(!thrd2.isAlive() || !thrd1.isAlive()) {

                System.out.println("No deadlock found");

           }

     }

}