CompletableFuture---1

    /**
     * 两个任务同时并发执行 并有结果值返回
     * @throws Exception
     */
    public static void test1() throws Exception{
        StopWatch stopWatch = new StopWatch();
        stopWatch.start();
        CompletableFuture<String> future1 = new CompletableFuture<>();
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    System.out.println("future1");
                    Thread.sleep(1500);
                    future1.complete("I LOVE YOU1");
                }catch (Exception e){
                    System.out.println(e);
                }
            }
        }).start();


        CompletableFuture<String> future2 = new CompletableFuture<>();
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    System.out.println("future2");
                    Thread.sleep(2000);
                    future2.complete("I LOVE YOU2");
                }catch (Exception e){
                    System.out.println(e);
                }
            }
        }).start();

        System.out.println(future1.get() + "---" + future2.get());
        stopWatch.stop();
        System.out.println("stopWatch.getTotalTimeMillis():" + stopWatch.getTotalTimeMillis());
    }

返回结果如下图所示：

future1
future2
I LOVE YOU1---I LOVE YOU2
stopWatch.getTotalTimeMillis():2005