Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.concurrent.CountDownLatch;

public class Main {

    public static void main(String[] args) {
        Object obj1 = new Object();
        Object obj2 = new Object();
        CountDownLatch latch = new CountDownLatch(2);

        new Locker(obj1, obj2, latch).start();
        new Locker(obj2, obj1, latch).start();
    }
}

class Locker extends Thread {
    CountDownLatch latch;
    Object obj1;
    Object obj2;

    Locker(Object obj1, Object obj2, CountDownLatch latch) {
        this.obj1 = obj1;
        this.obj2 = obj2;
        this.latch = latch;
    }

    @Override
    public void run() {
        synchronized (obj1) {
            latch.countDown();
            try {
                latch.await();
            } catch (Exception e) {
                e.printStackTrace();
            }
            synchronized (obj2) {
                System.out.println("Thread finished");
            }
        }
    }
}