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  • Future Clalback使用案例

    目前知道可以实现线程按照顺序的java原生方法有 join(),CountDownLatch,Executors.newSingleThreadExecutor(),FutureTask..

    Future Clalback配合使用

    package com.juc.threadpool;
    
    import java.util.concurrent.*;
    
    /**
     * Created by Administrator on 2018/6/28.
     */
    public class FutureCallBack {
    
        public static void main(String[] args) throws ExecutionException, InterruptedException {
    
            Callable<Integer> callable = () -> {
                TimeUnit.MILLISECONDS.sleep(3000);
                return 3;
            };
    
            FutureTask futureTask = new FutureTask(callable);
            FutureTask futureTask2 = new FutureTask(new MyTask());
            new Thread(futureTask).start();
    
            System.out.println(futureTask.get());//阻塞
            System.out.println("ssssssssssssssssssssss");
            new Thread(futureTask2).start();
            System.out.println(futureTask2.get());//阻塞
            System.out.println("ssssssssssssssssssssss");
            if(futureTask.isDone()){
                new Thread(futureTask2).start();
            }
            System.out.println(futureTask2.get());//阻塞
    
    
            //线程池使用
            ExecutorService executorService = Executors.newSingleThreadExecutor();
             executorService.submit(futureTask);
            System.out.println(futureTask.get());
            executorService.shutdown();
        }
    
        static class MyTask implements Callable<Integer> {
    
            @Override
            public Integer call() throws Exception {
                Thread.sleep(1000);
                return 1;
            }
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/jinjian91/p/9241088.html
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