[Ch15] Simplistic example for the book

import java.util.concurrent.TimeUnit;

public class ClosingTime {

  public static void main(String[] args) throws InterruptedException {

    fullShutdown();

  public static void main(String[] args) {

    ExecutorService threadPool = Executors.newFixedThreadPool(2);

    threadPool.execute(new LongJob("Long Job 1"));

    threadPool.execute(new ShortJob("Short Job"));

    threadPool.shutdown();

    try {

      System.out.println("Finished? " + threadPool.awaitTermination(4, TimeUnit.SECONDS));

    } catch (InterruptedException e) {

      e.printStackTrace();

    }

    threadPool.shutdownNow();

  }

  static void fullShutdown() throws InterruptedException {