Question

public void playMet() {

    int tempo = Integer.parseInt(met_speed.getText());
    tempo = tempo/60;
    int delay = tempo*1000; 

    if(Play.isSelected()) {
        try {
            FileInputStream in = new FileInputStream(new File("Click1.wav"));

            AudioStream as = new AudioStream(in);
            AudioPlayer.player.start(as);

            Thread.sleep(tempo*1000);
            playMet();

        } 
        catch (Exception e) {
            JOptionPane.showMessageDialog(null, e);
        }

    } 
    else
        System.out.println("not playing");
}

这是我的代码的一部分，基本上当按下按钮时，它每分钟播放一次X次。

我已尝试使用这样的while循环代码：

while(Play.isSelected()) {
.........
.........
}

那也没有用。在这两种情况下，程序都应该运行，但冻结，我必须从任务管理器关闭它。

如何在按下按钮时调用某个功能，如果取消选择它可以停止它？

P.S。刚看到下面的两个帖子。必须去上班，稍后会检查它们，看看它们是否有效。谢谢你的帮助。

Answer 1

递归调用阻止了Event Dispatch Thread。你必须创建一个新的线程来阻止EDT。

public void playMet()
{
    Thread t = new Thread(new Runnable()
    {
        @Override
        public void run()
        {
            while(Play.isSelected()){
                //Your code
            }
        }
    };
    t.start();
}

Answer 2

你不需要Thread.sleep（），你不需要递归或while循环。你需要有状态的球员。而你的UI应该只改变播放器的状态。

查看https://stackoverflow.com/a/7524627/2078908

中的示例

private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
private ScheduledFuture<?> playingTask;
private FileInputStream playing;

public void playMet() {
    stopPlaying();
    playingTask = executor.scheduleWithFixedDelay(new Runnable() {
        @Override
        public void run() {
            playMet();
        }
    }, 0, 1000, TimeUnit.MILLISECONDS);
}

public void playMetOnce(){
    try {
         IOUtils.close(playing);
         playing = new FileInputStream(new File("Click1.wav"));

         AudioStream as = new AudioStream(playing);
         AudioPlayer.player.start(as);
     } catch (Exception e)
     {
         JOptionPane.showMessageDialog(null, e);
     }
}

public void stopPlaying(){
    try {
        AudioPlayer.player.stop();
        IOUtils.close(playing);
        playing = null;
        if (playingTask != null) {
            playingTask.cancel(false);
        }
        playingTask = null;
    } catch (Exception e) {
        JOptionPane.showMessageDialog(null, e);
    }
}

Java JToggleButton在While循环中冻结

2 个答案: