1. 程式人生 > >FutureTask獲取執行緒返回值

FutureTask獲取執行緒返回值

  • 定義執行緒池:

    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); } });
  • 定義執行緒:

    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("執行執行緒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<FutureTask<Boolean>> taskList = Lists.newArrayList();
    
       // 非同步執行
       for (int
    i = 0; i < 10; i++) { FutureTask<Boolean> ft = new FutureTask(new TestThread(i)); taskList.add(ft); executor.submit(ft); } // TODO do something FutureTask<Boolean> ft; // 獲取非同步執行結果 for (int i = 0; i < taskList.size(); i++) { ft = taskList.get(i); System.out.println("執行緒" + i + " 返回資料:" + ft.get()); } }