Java杀死或终止线程 [英] Java kill or terminate a thread

问题描述

大家好：
基本上，当用户按下终止按钮时，我需要终止或停止运行线程。该线程遍历arraylist并在JTextArea上显示每个事件。要求是当用户按下终止按钮时，我需要终止正在运行的线程，同时将新的终止事件添加到数组列表中，并使其再次运行以打印编程终止。以下代码类型有效，但在控制台中出现了java.util.ConcurrentModificationException。有人可以帮忙吗？

Hi all: Basically I need to kill or stop a thread running when user press a Terminate button. This thread loop through a arraylist and display each event on JTextArea. The requirement is when user press the Terminate button, I need to terminate the running thread and at the same time ADD a new "Terminating" event to the arraylist and let it run again to print "Programing terminating". The following code kind of "works", but I got a java.util.ConcurrentModificationException in the console. Anyone can help?

public void startEvents()
    {
        terminate = false;
        worker = new Thread(new Runnable()
        {
            public void run()
            {
                Iterator<Event> it = eventList.iterator();

                while (it.hasNext())
                {
                    waitWhileSuspended();
                    terminatEvents();
                    Event ev = it.next();
                    try
                    {
                        Thread.sleep(ev.getDelayTime());
                    } catch (InterruptedException e1)
                    {
                        e1.printStackTrace();
                    }
                    jTextArea.append(ev.toString() + "\n");
                    it.remove();
                }
                jbStart.setEnabled(true);
                jmiStart.setEnabled(true);
                jbRestart.setEnabled(true);
                jmiRestart.setEnabled(true);
            }
        });
        worker.start();
    }
public void terminatEvents()
    {
        while(terminate)
        {
            Thread.yield();
            eventList.clear();
            eventList.add(new Terminate(delayTime));
            startEvents();

        }
    }

推荐答案

似乎您在迭代列表时正在修改列表（清除列表然后添加新的 Terminate 事件）。这就是为什么您得到 ConcurrentModificationException 的原因。

It looks like you are modifying the list (clearing it then adding a new Terminate event) while iterating on it. That's why you get the ConcurrentModificationException.

我建议您简单地使用终止符（）方法，并调用它以停止打印列表中的事件，然后在不使用列表的情况下打印新的 Terminate 事件。

I would advise you to simply have a terminate() method in your thread object, and call it to stop printing event the list THEN print the new Terminate event, without using the list.

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