joining.java

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//: c13:Joining.java
// Understanding join().
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import com.bruceeckel.simpletest.*;

class Sleeper extends Thread {
  private int duration;
  public Sleeper(String name, int sleepTime) {
    super(name);
    duration = sleepTime;
    start();
  }
  public void run() {
    try {
      sleep(duration);
    } catch (InterruptedException e) {
      System.out.println(getName() + " was interrupted. " +
        "isInterrupted(): " + isInterrupted());
      return;
    }
    System.out.println(getName() + " has awakened");
  }
}

class Joiner extends Thread {
  private Sleeper sleeper;
  public Joiner(String name, Sleeper sleeper) {
    super(name);
    this.sleeper = sleeper;
    start();
  }
  public void run() {
   try {
      sleeper.join();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }
    System.out.println(getName() + " join completed");
  }
}

public class Joining {
  private static Test monitor = new Test();
  public static void main(String[] args) {
    Sleeper
      sleepy = new Sleeper("Sleepy", 1500),
      grumpy = new Sleeper("Grumpy", 1500);
    Joiner
      dopey = new Joiner("Dopey", sleepy),
      doc = new Joiner("Doc", grumpy);
    grumpy.interrupt();
    monitor.expect(new String[] {
      "Grumpy was interrupted. isInterrupted(): false",
      "Doc join completed",
      "Sleepy has awakened",
      "Dopey join completed"
    }, Test.AT_LEAST + Test.WAIT);
  }
} ///:~