Future 与 FutureTask与线程池

 

FutureTask 有future与Runnable的特征 (实现interface)

 线程池execute(Runnable) 返回 Future<> future , 可以通过 future.get( ) 获取结果

 

 也可以把FutureTask 提交到线程池执行，然后直接task.get( ) 

 

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

public class FutureTaskDemo {       public static void main(String[] args) {           Task task = new Task();           FutureTask<Integer> integerFutureTask = new FutureTask<>(task);           new Thread(integerFutureTask).start();           try {               System.out.println("task运行结果："+integerFutureTask.get());           } catch (InterruptedException e) {               e.printStackTrace();           } catch (ExecutionException e) {               e.printStackTrace();           }       }   }   class Task implements Callable<Integer> {       @Override       public Integer call() throws Exception {           System.out.println("子线程正在计算");           int sum = 0;           for (int i = 0; i < 100; i++) {               sum += i;           }           return sum;       }   }