future应用相关

package com.future;

import java.util.concurrent.*;


public class FDemo {
    public static final ExecutorService service = Executors.newSingleThreadExecutor();
    public static final ExecutorService service1 = Executors.newSingleThreadExecutor();
    public static final ExecutorService threadPoolExecutor = new ThreadPoolExecutor(4, 10, 60, TimeUnit.MILLISECONDS, new LinkedBlockingQueue(5));

    public static void main(String[] args) throws InterruptedException, ExecutionException, TimeoutException {
        Future<Boolean> booleanTask = threadPoolExecutor.submit(() -> {
            Thread.sleep(3000);
            return true;
        });
        System.out.println("11111111111");
        // 任务2
        Future<String> stringTask = threadPoolExecutor.submit(() -> {
            Thread.sleep(4000);
            return "Hello World";
        });
        //当get的时候开始计算超时，如果不需要考虑超时，可以使用
        //!booleanTask.isCancelled()&&booleanTask.isDone()来获取值
        Boolean result1 = booleanTask.get(3, TimeUnit.SECONDS);
        System.err.println("任务1-10s： " + result1);

　　　　 //当过去3秒才会执行到这里，stringTask延迟4秒，即只要允许超过1秒可以获取消息就行，而这里是允许3秒后才获取结果
        String result = stringTask.get(3, TimeUnit.SECONDS);
        System.err.println("任务2-3s： " + result);


    }


}