[Ch15] Using shutdown and shutdownNow

import java.util.concurrent.TimeUnit;

public class ClosingTime {

  public static void main(String[] args) {

    shutdownGracefully();

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

    fullShutdown();

  }

  static void fullShutdown() throws InterruptedException {

    ExecutorService threadPool = Executors.newFixedThreadPool(2);

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

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

    threadPool.execute(new LongJob("Long Job 2"));

    threadPool.execute(new LongJob("Long Job 3"));

    threadPool.execute(new LongJob("Long Job 4"));

    threadPool.execute(new ShortJob("Shouldn't start job"));

    threadPool.shutdown();

    ShortJob tooLateJob = new ShortJob("Too late job");

    try {

      threadPool.execute(tooLateJob);

    } catch (RejectedExecutionException e) {

      System.out.println("Too late to start another job!! " + tooLateJob);

    }

    threadPool.awaitTermination(4, TimeUnit.SECONDS);

    List<Runnable> unfinished = threadPool.shutdownNow();

    System.out.println("unfinished.size() = " + unfinished.size());

    for (Runnable runnable : unfinished) {

      System.out.println(runnable);

    }

  }

  static void shutdownGracefully() {