public class Main { public static class MyCallable implements Callable{ public Integer call() throws Exception { return 1; } } public static void main(String[] args) { MyCallable callable=new MyCallable(); FutureTask task=new FutureTask(callable); Thread t=new Thread(task); try { t.start(); System.out.println(task.get()); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (ExecutionException e) { // TODO Auto-generated catch block e.printStackTrace(); } } 操作系统分配线程执行权是随机的。那么有没有可能出现先执行了`System.out.println(task.get());`的情况。主线程依赖这个工作线程的值。那么会不会出现先执行了主线程呢? 答案地址