第五次作业

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;

import javax.swing.*;
import java.io.File;

class AudioPlayDemo extends JFrame implements ActionListener {
boolean looping = false; 
File file1 = new File("music\明天会更好.wav");
AudioClip sound1;
AudioClip chosenClip;

JButton playButton = new JButton("播放"); 
JButton loopButton = new JButton("循环播放"); 
JButton stopButton = new JButton("停止"); 
JLabel status = new JLabel("选择播放文件"); 
JPanel controlPanel = new JPanel(); 
Container container = getContentPane(); 

public AudioPlayDemo() { 
try {
sound1 = Applet.newAudioClip(file1.toURL());
chosenClip = sound1;
} catch(OutOfMemoryError e){
System.out.println("内存溢出");
e.printStackTrace();
} catch(Exception e){
e.printStackTrace();
}
playButton.addActionListener(this);
loopButton.addActionListener(this);
stopButton.addActionListener(this);
stopButton.setEnabled(false); 

controlPanel.add(playButton);
controlPanel.add(loopButton);
controlPanel.add(stopButton);

container.add(controlPanel, BorderLayout.CENTER);
container.add(status, BorderLayout.SOUTH);

setSize(300, 130); 
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //关闭窗口时退出程序
}

public void actionPerformed(ActionEvent event) {
if (chosenClip == null) {
status.setText("声音未载入");
return; 
}
Object source = event.getSource(); //获取用户洗涤激活的按钮

if (source == playButton) {
stopButton.setEnabled(true); 
loopButton.setEnabled(true); 
chosenClip.play(); 
status.setText("正在播放");
}

if (source == loopButton) {
looping = true;
chosenClip.loop(); 
loopButton.setEnabled(false); 
stopButton.setEnabled(true); 
status.setText("正在循环播放"); 
}
if (source == stopButton) {
if (looping) {
looping = false;
chosenClip.stop(); 
loopButton.setEnabled(true);
} else {
chosenClip.stop();
}
stopButton.setEnabled(false); 
status.setText("停止播放");
}
}
public static void main(String s[]) {
new AudioPlayDemo(); 
}
}