import java.util.concurrent.Executor;

public class ExecutorTest1 {
    public ExecutorTest1() {
        System.out.println("Initial Threads:");
        ConcurrentUtils.listThread();

        Executor executor = new DirectExecutor();
        System.out.println("Processing Threads:");
        ConcurrentUtils.listThread();

        executor.execute(new RunnableTask());
        System.out.println("RuunableTask has Done.");

        System.out.println("Terminating Threads:");
        ConcurrentUtils.listThread();
    }

    class RunnableTask implements Runnable {
        public void run() {
            try {
                Thread.sleep(3000L);
            } catch (InterruptedException ex) {
                System.out.println("RunnableTask is Canceled");
                return;
            }
            System.out.println("RunnableTask is Done.");
        }
    }

    public static void main(String[] args) {
        new ExecutorTest1();
    }
}