Descriptive Question

Quiz Guidelines

 

QID: 
54
Validated against: 
java8
Question: 

Predict the output:

public class ThreadSynchronization {

  public static void main(String[] args) throws InterruptedException {
    Object lockObject = new Object();

    Thread t1 = new Thread(new MyRunnableEven(lockObject));
    Thread t2 = new Thread(new MyRunnableOdd(lockObject));
    t1.start();
    t2.start();
  }
}

class MyRunnableEven implements Runnable {

  private Object lockObject;

  MyRunnableEven(Object lockObject) {
    this.lockObject = lockObject;
  }

  @Override
  public void run() {

    for (int i = 0; i <= 10; i = i + 2) {

      synchronized (lockObject) {
        try {
          System.out.println("Even " + i);
          lockObject.notify();
          lockObject.wait();

        } catch (InterruptedException e) {
          e.printStackTrace();
        }
      }
    }
  }
}

class MyRunnableOdd implements Runnable {

  private Object lockObject;

  MyRunnableOdd(Object lockObject) {
    this.lockObject = lockObject;
  }

  @Override
  public void run() {

    for (int i = 1; i < 10; i = i + 2) {
      
      synchronized (lockObject) {
        try {
          lockObject.wait();
          System.out.println("Odd " + i);
          lockObject.notify();
          

        } catch (InterruptedException e) {
          e.printStackTrace();
        }
      }
    }
  }
}

Q&A Set: 

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