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Java program to demonstrate the Thread.join() method

Java example to demonstrate the Thread.join() method.
Submitted by Nidhi, on April 10, 2022

Problem Solution:

In this program, we will demonstrate the Thread.join() method. The join() method is used to join the start of the execution of a thread to the end of another thread's execution.

Program/Source Code:

The source code to demonstrate the Thread.join() method is given below. The given program is compiled and executed successfully.

// Java program to demonstrate Thread.join() method

class MyThread implements Runnable {
  public void run() {
    try {
      System.out.println(Thread.currentThread().getName() + " is alive: " + Thread.currentThread().isAlive());
    } catch (Exception e) {

    }
  }
}

public class Main {
  public static void main(String[] args) {
    try {
      Thread t = new Thread(new MyThread());

      t.start();

      //Waits for 500ms this thread to die.
      t.join(500);

      System.out.println(t.getName() + " is alive: " + t.isAlive());
    } catch (Exception e) {

    }
  }
}

Output:

Thread-0 is alive: true
Thread-0 is alive: false

Explanation:

In the above program, we created two classes MyThread and Main. We created MyThread class by implementing the Runnable interface.

The Main class contains a main() method. The main() method is the entry point for the program. Here, we created a thread and used the join() method to join the start of the execution of a thread to the end of another thread's execution.

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