在Java中：如何让线程监视另一个线程？ [英] In Java: how can I make thread watch over another thread?

问题描述

很抱歉，问题很简单。我是初学者。

Sorry if the question is quite simple. I am a beginner.

我必须创建线程来计算某些东西，而第一个线程工作，另一个必须测量第一个线程是否在指定时间内计算函数。如果没有，它必须抛出异常。否则它会返回答案。

I have to create thread that calulates something, while the first thread works the other one have to measure if the first thread calculate the function in specified time. If not, it has to throw exception. Else it returns the answer.

推荐答案

我将采用java.util.concurrent组件 - 简单示例

I'd take the java.util.concurrent components - simple example

public void myMethod() {
    // select some executor strategy
    ExecutorService executor = Executors.newFixedThreadPool(1);
    Future f = executor.submit(new Runnable() {
        @Override
        public void run() {
            heresTheMethodToBeExecuted();
        }
    });
    try {
        f.get(1000, TimeUnit.MILLISECONDS);
    } catch (InterruptedException e) {
        // do something clever
    } catch (ExecutionException e) {
        // do something clever
    } catch (TimeoutException e) {
        // do something clever
    }
}

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