java - While 循环在音频播放器中不起作用

Question

我正在使用声音播放器，并且我正在尝试创建一个 while 循环，该循环知道何时终止正在播放的 JFrame。 while 循环应该在剪辑(录制)播放时循环播放并在剪辑完成后结束。但问题是:while 循环仅在打印出某些内容时才起作用，而我不希望它这样做？

import java.io.*;
import java.net.URL;
import javax.sound.sampled.*;
import javax.swing.*;

public class SoundClipTest extends JFrame {

public SoundClipTest() {
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  try {
     // Open an audio input stream.
    File soundFile = new File("Testing/recording (2).wav");
    AudioInputStream audioIn = AudioSystem.getAudioInputStream(soundFile);
    //URL url = new URL("http://maximumdonline.com/miscwavs/pacman.wav");
    //AudioInputStream audioIn = AudioSystem.getAudioInputStream(url);
     // Get a sound clip resource.
     Clip clip = AudioSystem.getClip();

     // Open audio clip and load samples from the audio input stream.
     clip.open(audioIn);
     clip.start();
     this.setVisible(true);
     this.setVisible(false);
     boolean run = true;

     //problem While Loop
     while(clip.isActive()){
          //Only works when I print something out during the loop:
         //System.out.println(run);

     }
     //Test While Loop has ended.
     run = false;
     System.out.println(run);
     //Close JFrame
  } catch (UnsupportedAudioFileException e) {
     e.printStackTrace();
  } catch (IOException e) {
     e.printStackTrace();
  } catch (LineUnavailableException e) {
     e.printStackTrace();
  }
}

注意:此声音代码大部分来自 https://www.ntu.edu.sg/home/ehchua/programming/java/J8c_PlayingSound.html有用。我已经测试过了，但是我的 while 循环正在哭泣!

Answer 1

完成此任务的正确方法是将 LineListener 添加到 Clip。 Clip 实现了 javax.sound.sampled.Line 接口(interface)，因此我们可以使用 Line.addLineListener(LineListener) ..

Adds a listener to this line. Whenever the line's status changes, the listener's update() method is called with a LineEvent object that describes the change.