game loop that can bepaused / stopped.

SomeClass.java

package com.example.foo;

public class SomeClass {
  public static void main(final String[] args) {

    final Thread thread = new Thread(SomeClass::gameLoop);

    thread.start();

    new Thread(() -> {
      try {
        Thread.sleep(2000);
      } catch (final Exception e) {
        e.printStackTrace();
      }
      SomeClass.running = false;
    }).start();
  }

  static volatile boolean running = true;

  private static void gameLoop() {
    if (!running) {
      System.out.println("Good Bye");
      return;
    }
    try {
      Thread.sleep(500);
    } catch (final InterruptedException e) {
      return;
    }
    Thread.yield();
    System.out.println("pong");
    gameLoop();
  }

}