运行下代码，你会发现，如果用shutdwon，那你就永远关不了线程池了，而用shutdownnow，在这种循环阻塞的情况下，可以用isinterrupt来判断退出 ``` import java.util.concurrent.LinkedBlockingQueue; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit; /** * @author laoliangliang * @date 2019/7/19 15:59 */ public class ThreadPractice { public void startTread(){ ThreadPoolExecutor poolExecutor = new ThreadPoolExecutor(4, 4, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<>(1)); poolExecutor.submit(new MyThread()); poolExecutor.submit(new MyThread()); poolExecutor.submit(new MyThread()); poolExecutor.submit(new MyThread()); // poolExecutor.shutdown(); poolExecutor.shutdownNow(); try { while(true){ boolean b = poolExecutor.awaitTermination(1, TimeUnit.MILLISECONDS); System.out.println(b); if (b) { break; } } } catch (InterruptedException e) { e.printStackTrace(); } } public static void main(String[] args) { ThreadPractice practice = new ThreadPractice(); practice.startTread(); } class MyThread implements Runnable{ @Override public void run() { while(true){ System.out.println(Thread.currentThread().getId()); System.out.println(System.currentTimeMillis()); if(Thread.currentThread().isInterrupted()){ System.out.println("中断退出"); break; } try { Thread.sleep(1000); } catch (InterruptedException e) { System.out.println("阻塞退出"); break; } } } } } ```
