线程创建 两个任务 只要一个完成

runAfterEither:不能获取完成的线程的返回结果，自身也没有返回结果
* acceptEither:可以获取线程的返回结果，自身没有返回结果
* applyToEither:既可以获取线程的返回结果，自身也有返回结果

public class CompletableFutureDemo04 {
    private static ThreadPoolExecutor executor=new ThreadPoolExecutor(5,
            50, 
            10,
            TimeUnit.SECONDS, 
            new LinkedBlockingQueue<>(),
            Executors.defaultThreadFactory(),
           new  ThreadPoolExecutor.AbortPolicy());
    //运行时发现 线程会阻塞 等待新的任务去调度
    
    /**
     * 
     * @throws ExecutionException
     * @throws InterruptedException
     */
    public static void main(String[] args) throws Exception {
        CompletableFuture<Integer> future1 = CompletableFuture.supplyAsync(() -> {
            System.out.println("线程1开始了" + Thread.currentThread().getName());
            int i = 100 / 10;
            System.out.println("线程1结束了" + Thread.currentThread().getName());
            return i;
        }, executor);
    
        CompletableFuture<Integer> future2 = CompletableFuture.supplyAsync(() -> {
            System.out.println("线程2开始了" + Thread.currentThread().getName());
            int i = 100 / 5;
            try {
                Thread.sleep(5000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("线程2结束了" + Thread.currentThread().getName());
            return i;
        }, executor);
      //runAfterEitherAsync 是不能获取前面线程的返回结果 自身也没有返回结果
        future1.runAfterEitherAsync(future2, () -> {
            System.out.println("任务3执行了");
        },executor);
        
        //acceptEitherAsync  自身没有返回结果  接收上面两个线程其中一个 结果就能正常运行  并且线程1和线程2的返回泛型类型必须相同 可以写成Object
        future1.acceptEitherAsync(future2, res -> {
            System.out.println("res = " + res);
        }, executor);
    
        CompletableFuture<String> stringCompletableFuture = future1.applyToEitherAsync(future2, res -> {
            System.out.println("res = " + res);
            return res + "--->ok";
        }, executor);
    
        System.out.println("stringCompletableFuture:"+stringCompletableFuture.get());
    }
}

标签：创建,executor,System,任务,线程,res,println,out
来源： https://www.cnblogs.com/Lcch/p/16354268.html