我有一个程序，它应该有一个gui，你在一个文本框中输入值，它作为计时器倒计时。线程处理倒计时，停止按钮应该停止倒计时。我有一个布尔值来设置循环是否运行。问题是，按钮更改值所做的任何努力都将被忽略。当按下按钮时，布尔值被设置为true，但是如果我随后再次检查它，它会返回false。我不明白为什么会这样。
这是倒计时法。

class countClockDown implements Runnable
    {
        int hour, min, sec, mili;
        volatile boolean stop = false;
        countClockDown()
        {
        }
        void setCountClockDown(int a, int b, int c)
        {
            hour = a;
            min = b;
            sec = c;
        }

        void setCountClockDown(int a, int b, int c, int d)
        {
            hour = a;
            min = b;
            sec = c;
            mili = d;
        }
        void stopRunning()
        {
            stop = true;
        }
        public void run()
        {
            while(!stop && (hour != 0 | min != 0 | sec > 0 | mili > 0))
            {
                Thread.yield();
                if (mili < 0)
                {
                    mili = 999;
                    sec--;
                }
                if (sec < 0)
                {
                    sec = 59;
                    min--;
                }
                if (min < 0)
                {
                    min = 59;
                    hour--;
                }
                mili--;

                countHRIn.setText(String.valueOf(hour));
                countMINIn.setText(String.valueOf(min));
                countSECIn.setText(String.valueOf(sec));
                try
                {
                    Thread.sleep(1);
                }
                catch (InterruptedException e)
                {
                }
            }
        }

    }

这是按钮。

public void actionPerformed(ActionEvent ae)
    {
        int hour, min, sec, mil;
        Object source = ae.getSource();
        countClockDown cd = new countClockDown();
        countClockUp cu = new countClockUp();
        Thread t = new Thread(cd);

        if (source == countStart)
        {
            hour = Integer.parseInt(countHRIn.getText());
            min = Integer.parseInt(countMINIn.getText());
            sec = Integer.parseInt(countSECIn.getText());
            cd.setCountClockDown(hour, min, sec);
            t.start();
        }

        if (source == countStop)
        {
            cd.stop = true;
            t.interrupt();
            System.out.print(cd.stop);
        }

感谢您的帮助。