异步or线程池

public class ThreadTest {
    

    public static ExecutorService executor = Executors.newFixedThreadPool(10);

    public static void main(String[] args) throws ExecutionException, InterruptedException {
    
        // System.out.println("main......start.....");
        // Thread thread = new Thread01();
        // thread.start();
        // System.out.println("main......end.....");

        // Runable01 runable01 = new Runable01();
        // new Thread(runable01).start();

        // FutureTask<Integer> futureTask = new FutureTask<>(new Callable01());
        // new Thread(futureTask).start();
        // System.out.println(futureTask.get());

        // service.execute(new Runable01());
        // Future<Integer> submit = service.submit(new Callable01());
        // submit.get();

        System.out.println("main......start.....");
        // CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {
    
        // System.out.println("当前线程：" + Thread.currentThread().getId());
        // int i = 10 / 2;
        // System.out.println("运行结果：" + i);
        // }, executor);

        /** * 方法完成后的处理 */
        // CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
    
        // System.out.println("当前线程：" + Thread.currentThread().getId());
        // int i = 10 / 0;
        // System.out.println("运行结果：" + i);
        // return i;
        // }, executor).whenComplete((res,exception) -> {
    
        // //虽然能得到异常信息，但是没法修改返回数据
        // System.out.println("异步任务成功完成了...结果是：" + res + "异常是：" + exception);
        // }).exceptionally(throwable -> {
    
        // //可以感知异常，同时返回默认值
        // return 10;
        // });

        /** * 方法执行完后端处理 */
        // CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
    
        // System.out.println("当前线程：" + Thread.currentThread().getId());
        // int i = 10 / 2;
        // System.out.println("运行结果：" + i);
        // return i;
        // }, executor).handle((result,thr) -> {
    
        // if (result != null) {
    
        // return result * 2;
        // }
        // if (thr != null) {
    
        // System.out.println("异步任务成功完成了...结果是：" + result + "异常是：" + thr);
        // return 0;
        // }
        // return 0;
        // });


        /** * 线程串行化 * 1、thenRunL：不能获取上一步的执行结果 * 2、thenAcceptAsync：能接受上一步结果，但是无返回值 * 3、thenApplyAsync：能接受上一步结果，有返回值 * */
        CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
    
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
            return i;
        }, executor).thenApplyAsync(res -> {
    
            System.out.println("任务2启动了..." + res);
            return "Hello" + res;
        }, executor);
        System.out.println("main......end....." + future.get());

    }

    private static void threadPool() {
    

        ExecutorService threadPool = new ThreadPoolExecutor(
                200,
                10,
                10L,
                TimeUnit.SECONDS,
                new LinkedBlockingDeque<Runnable>(10000),
                Executors.defaultThreadFactory(),
                new ThreadPoolExecutor.AbortPolicy()
        );

        //定时任务的线程池
        ExecutorService service = Executors.newScheduledThreadPool(2);
    }


    public static class Thread01 extends Thread {
    
        @Override
        public void run() {
    
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
        }
    }


    public static class Runable01 implements Runnable {
    
        @Override
        public void run() {
    
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
        }
    }


    public static class Callable01 implements Callable<Integer> {
    
        @Override
        public Integer call() throws Exception {
    
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
            return i;
        }
    }

}