如何在Java中执行特定时期的任务? [英] How to execute task for a specific period in Java.?

问题描述

实际上，我将在确定的时间内执行特定任务(一组指令).

In fact I would execute a specific task( a set of instructions) for a determined period.

例如:我希望我的程序在5分钟内执行任务，如果得到正确的结果，它将停止运行，否则它将在5分钟内继续执行正常任务，最后告诉我.

For example : I want my program to execute the task for 5 minutes, if it gets the right result it stops , else it will continue executing normal task for the 5 minutes and in the end it tells me.

如何用Java实现呢?

How can I implement this in Java.

推荐答案

您可以执行以下操作:

import java.util.concurrent.* ;

ExecutorService svc = Executors.newFixedThreadPool( 1 ) ;
svc.submit( new Runnable() {
  public void run() {
    // Do long running task
  }
} ) ;
svc.shutdown() ;
svc.awaitTermination( 300, TimeUnit.SECONDS ) ;

用于 ExecutorService的Javadocs

不过，我可能要注意，根据您长期运行的任务正在执行的操作，可能无法强制其停止运行

I should probably note however that depending on what your long running task is doing, it may not be possible to force it to stop running

[edit2] Submit方法返回一个Future对象，然后您可以调用该对象get

[edit2] the submit method returns a Future object, which you can then call get on with a timeout. This get call will block until a result is ready, or if the timeout is reached throw a TimeoutException. In this way, you can get a result back from your long running task if that is what you wanted

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