我知道 Clip.stop() 方法，但是当我将它放在 key_events 中时它似乎不起作用。它只会导致错误。好吧，我知道为什么会导致错误。因为我要求它基本上停止几行之后才存在的剪辑。但是使用相同的逻辑或接近它（如果可能），我如何重新编码，以便它知道选择从上一个 key_event 播放的上一个剪辑。我想要的功能是：当按下 F1 时，会播放 wav 音乐。当按下 F2 时，当前的 wav 停止，新的 wav 开始。当按下 F3 时，当前的 wav 停止，新的 wav 开始。等等等等等等。
case KeyEvent.VK_F1:
try {
//stop any sound
clip.stop();
sample = AudioSystem.getAudioInputStream(getURL(filename));
//create a sound buffer
Clip clip = AudioSystem.getClip();
//load the audio file
clip.open(sample);
//play sample
clip.start();
} catch (MalformedURLException ez) {
} catch (IOException ez) {
} catch (LineUnavailableException ez) {
} catch (UnsupportedAudioFileException ez) {
} catch (Exception ez) { }
break;
case KeyEvent.VK_F2:
try {
//stop any sound
clip.stop();
sample = AudioSystem.getAudioInputStream(getURL(filename2));
//create a sound buffer
Clip clip = AudioSystem.getClip();
//load the audio file
clip.open(sample);
//play sample
clip.start();
} catch (MalformedURLException ez) {
} catch (IOException ez) {
} catch (LineUnavailableException ez) {
} catch (UnsupportedAudioFileException ez) {
} catch (Exception ez) { }
break;
case KeyEvent.VK_F3:
try {
//stop any sound
clip.stop();
sample = AudioSystem.getAudioInputStream(getURL(filename3));
//create a sound buffer
Clip clip = AudioSystem.getClip();
//load the audio file
clip.open(sample);
//play sample
clip.start();
} catch (MalformedURLException ez) {
} catch (IOException ez) {
} catch (LineUnavailableException ez) {
} catch (UnsupportedAudioFileException ez) {
} catch (Exception ez) { }
break;
case KeyEvent.VK_F4:
try {
//stop any sound
clip.stop();
sample = AudioSystem.getAudioInputStream(getURL(filename4));
//create a sound buffer
Clip clip = AudioSystem.getClip();
//load the audio file
clip.open(sample);
//play sample
clip.start();
} catch (MalformedURLException ez) {
} catch (IOException ez) {
} catch (LineUnavailableException ez) {
} catch (UnsupportedAudioFileException ez) {
} catch (Exception ez) { }
break;
case KeyEvent.VK_F5:
try {
//stop any sound
clip.stop();
sample = AudioSystem.getAudioInputStream(getURL(filename5));
//create a sound buffer
Clip clip = AudioSystem.getClip();
//load the audio file
clip.open(sample);
//play sample
clip.start();
} catch (MalformedURLException ez) {
} catch (IOException ez) {
} catch (LineUnavailableException ez) {
} catch (UnsupportedAudioFileException ez) {
} catch (Exception ez) { }
break;
case KeyEvent.VK_F6:
try {
//stop any sound
clip.stop();
sample = AudioSystem.getAudioInputStream(getURL(filename6));
//create a sound buffer
Clip clip = AudioSystem.getClip();
//load the audio file
clip.open(sample);
//play sample
clip.start();
} catch (MalformedURLException ez) {
} catch (IOException ez) {
} catch (LineUnavailableException ez) {
} catch (UnsupportedAudioFileException ez) {
} catch (Exception ez) { }
break;
case KeyEvent.VK_F7:
try {
//stop any sound
clip.stop();
sample = AudioSystem.getAudioInputStream(getURL(filename7));
//create a sound buffer
Clip clip = AudioSystem.getClip();
//load the audio file
clip.open(sample);
//play sample
clip.start();
} catch (MalformedURLException ez) {
} catch (IOException ez) {
} catch (LineUnavailableException ez) {
} catch (UnsupportedAudioFileException ez) {
} catch (Exception ez) { }
break;
任何帮助将不胜感激:) 谢谢
很难 100% 确定，但看起来你正在隐藏你的变量......
clip.stop();
sample = AudioSystem.getAudioInputStream(getURL(filename));
//create a sound buffer
Clip clip = AudioSystem.getClip();
事实上，我什至不确定这将如何编译......
Define Clip作为实例变量，当程序初始化时，初始化Clip同时。
你应该可以打电话stop任何时候，但这只会重置Clip返回到当前输入的开头。您还需要做的是关闭Clip，这会释放由该管理器管理的内部资源Clip对于当前输入...
KeyListeners 也是出了名的麻烦，你应该考虑使用按键绑定因为它们为您提供了控制来确定可以生成关键事件的焦点级别，例如......
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestPlayer {
public static void main(String[] args) {
new TestPlayer();
}
public TestPlayer() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
try {
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
} catch (LineUnavailableException exp) {
exp.printStackTrace();
}
}
});
}
public class TestPane extends JPanel {
private Clip clip;
private List<File> playList;
private int index;
private JLabel label;
public TestPane() throws LineUnavailableException {
label = new JLabel("Play stuff");
add(label);
clip = AudioSystem.getClip();
File[] files = new File("A folder of music files").listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
return file.getName().toLowerCase().endsWith(".wav");
}
});
playList = new ArrayList<>(Arrays.asList(files));
index = -1;
InputMap im = getInputMap(WHEN_IN_FOCUSED_WINDOW);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0), "previous");
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0), "next");
ActionMap am = getActionMap();
am.put("next", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
playNext();
}
});
am.put("previous", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
playPrevious();
}
});
}
public void playNext() {
index++;
if (index >= playList.size()) {
index = 0;
}
File file = playList.get(index);
play(file);
}
public void playPrevious() {
index--;
if (index < 0) {
index = playList.size() - 1;
}
File file = playList.get(index);
play(file);
}
public void play(File file) {
try {
stop();
label.setText(file.getName());
AudioInputStream sample = AudioSystem.getAudioInputStream(file);
clip.open(sample);
clip.start();
} catch (UnsupportedAudioFileException | IOException | LineUnavailableException exp) {
exp.printStackTrace();
}
}
public void stop() {
clip.stop();
clip.close();
}
}
}
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