CompletableFuture---1 

 1     /**
 2      * 两个任务同时并发执行 并有结果值返回
 3      * @throws Exception
 4      */
 5     public static void test1() throws Exception{
 6         StopWatch stopWatch = new StopWatch();
 7         stopWatch.start();
 8         CompletableFuture<String> future1 = new CompletableFuture<>();
 9         new Thread(new Runnable() {
10             @Override
11             public void run() {
12                 try {
13                     System.out.println("future1");
14                     Thread.sleep(1500);
15                     future1.complete("I LOVE YOU1");
16                 }catch (Exception e){
17                     System.out.println(e);
18                 }
19             }
20         }).start();
21 
22 
23         CompletableFuture<String> future2 = new CompletableFuture<>();
24         new Thread(new Runnable() {
25             @Override
26             public void run() {
27                 try {
28                     System.out.println("future2");
29                     Thread.sleep(2000);
30                     future2.complete("I LOVE YOU2");
31                 }catch (Exception e){
32                     System.out.println(e);
33                 }
34             }
35         }).start();
36 
37         System.out.println(future1.get() + "---" + future2.get());
38         stopWatch.stop();
39         System.out.println("stopWatch.getTotalTimeMillis():" + stopWatch.getTotalTimeMillis());
40     }

返回结果如下图所示：

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

 

posted @ 2020-11-24 10:47  郭慕荣  阅读(113)  评论(0)  编辑  收藏  举报