OnJava8-Examples/tasks/LiftOff.java

// tasks/LiftOff.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// Demonstration of the Runnable interface

public class LiftOff implements Runnable {
  protected int countDown = 10; // Default
  private static int taskCount = 0;
  private final int id = taskCount++;
  public LiftOff() {}
  public LiftOff(int countDown) {
    this.countDown = countDown;
  }
  public String status() {
    return "#" + id + "(" +
      (countDown > 0 ? countDown : "Liftoff!") + "), ";
  }
  @Override
  public void run() {
    while(countDown-- > 0) {
      System.out.print(status());
      Thread.yield();
    }
  }
}