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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 statement

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.

Java program to demonstrate the Thread.join() method

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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