FutureTask获取线程返回值

• 定义线程池：

  private static ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors() + 1,
      new ThreadFactory() {
          @Override
          public Thread newThread(Runnable r) {
              Thread thread = new Thread(r);
              thread.setName("TEST-THREAD");
              return new Thread(r);
          }
      });

• 定义线程：

  private class TestThread implements Callable<Boolean> {
  
     private int id;
  
     public TestThread(int id) {
         this.id = id;
     }
  
     @Override
     public Boolean call() throws Exception {
         System.out.println("执行线程id：" + id);
         try {
             // TODO do something
         } catch (Exception e) {
             return Boolean.FALSE;
         }
         return Boolean.TRUE;
     }
  }

• test方法：

  public static void main(String[] args) throws Exception {
     List> taskList = Lists.newArrayList();
  
     // 异步执行
     for (int i = 0; i < 10; i++) {
         FutureTask ft = new FutureTask(new TestThread(i));
         taskList.add(ft);
         executor.submit(ft);
     }
  
     // TODO do something
  
     FutureTask ft;
     // 获取异步执行结果
     for (int i = 0; i < taskList.size(); i++) {
         ft = taskList.get(i);
         System.out.println("线程" + i + " 返回数据：" + ft.get());
     }
  }