java 实现音乐播放器的简单实例

package cn.hncu.games;import java.applet.Applet;import java.applet.AudioClip;import java.awt.Color;import java.awt.Font;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.io.File;import java.net.URL;import javax.swing.DefaultListModel;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JList;import javax.swing.ListModel;import javax.swing.event.ListSelectionEvent;import javax.swing.event.ListSelectionListener;public class MusicPlayer extends JFrame{  //显示(歌曲名称)播放状态的标签  JLabel songNameLabel = null;  //四个播放功能键按钮  JButton btnLast = null; //上一曲  JButton btnPlay = null; //播放/停止  JButton btnNext = null; //下一曲  JButton btnLoop = null; //循环  //歌曲列表  JList songsList = null;  AudioClip songs[] = null;  AudioClip currentSong = null;  int index=0; //当前歌曲在JList中的位置(序号)  //歌曲文件名数组---String  String[] strSongNames={ "song1.wav","song2.wav","song3.wav","song4.wav","song5.wav","song6.wav" };  final String DIR="songs//";  //播放音乐的线程  Thread playerThread=null;  boolean isPlayOrStop = true;//true代表播放状态  boolean isLoop = false; //是否为循环状态  public MusicPlayer() {    super("音乐播放器");    setBounds(300, 50, 310, 500);    setDefaultCloseOperation(EXIT_ON_CLOSE);    setLayout(null);    //hello();    //显示(歌曲名称)播放状态的标签    songNameLabel = new JLabel();    Font songNameFont = new Font("黑体",Font.ITALIC,18);    songNameLabel.setFont(songNameFont);    songNameLabel.setText("我的音乐播放器");    songNameLabel.setBounds(10, 10, 300, 40);    getContentPane().add(songNameLabel);    //四个播放功能键按钮    btnLast = new JButton();    btnPlay = new JButton();    btnNext = new JButton();    btnLoop = new JButton();    //位置大小    btnLast.setBounds(10, 70, 50, 40);    btnPlay.setBounds(70, 70, 50, 40);    btnNext.setBounds(130, 70, 50, 40);    btnLoop.setBounds(190, 70, 50, 40);    //设置图片    btnLast.setIcon( new ImageIcon("images2/1.png"));    btnPlay.setIcon( new ImageIcon("images2/2.png"));    btnNext.setIcon( new ImageIcon("images2/3.png"));    btnLoop.setIcon( new ImageIcon("images2/4.png"));    //添加到框架    getContentPane().add(btnLast);    getContentPane().add(btnPlay);    getContentPane().add(btnNext);    getContentPane().add(btnLoop);    //添加监听    MyMouseListener mml = new MyMouseListener();    btnLast.addMouseListener(mml);    btnPlay.addMouseListener(mml);    btnNext.addMouseListener(mml);    btnLoop.addMouseListener(mml);    //歌曲列表的标题    JLabel listLabel = new JLabel("播放列表");    listLabel.setBounds(10, 120, 100, 30);    Font listLabelFont = new Font("黑体",Font.BOLD,16);    listLabel.setFont(listLabelFont);    getContentPane().add(listLabel);    //歌曲列表    /*    songsList = new JList();    songsList.setBounds(10, 150, 250, 300);    songsList.setBackground(Color.CYAN);    //把所有歌曲名逐个添加到List中    //songsList.setListData(strSongNames);    for(int i=0;i<strSongNames.length;i++){      DefaultListModel dm = (DefaultListModel)songsList.getModel();      dm.add(i,strSongNames[i]);    }    getContentPane().add(songsList);    */    DefaultListModel lm = new DefaultListModel();    songsList = new JList(lm);    songsList.setBounds(10, 150, 250, 300);    songsList.setBackground(Color.CYAN);    //把所有歌曲名逐个添加到List中    //songsList.setListData(strSongNames);    songs = new AudioClip[strSongNames.length];    for(int i=0;i<strSongNames.length;i++){      lm.add(i,strSongNames[i]);      songs[i] = loadSound(strSongNames[i]);    }    getContentPane().add(songsList);    //lm.remove(3);    //对JList控件的监听技术实现    songsList.addListSelectionListener(new ListSelectionListener() {      @Override      public void valueChanged(ListSelectionEvent e) {        currentSong.stop();        index = songsList.getSelectedIndex();        isPlayOrStop = true;        playerThread = new Thread( new MusicRun() );        playerThread.start();      }    });    //单开一个线程，专用于播放音乐    playerThread = new Thread( new MusicRun() );    playerThread.start();    setVisible(true);  }  private AudioClip loadSound(String fileName) {    try {      URL url = new URL("file:songs//"+fileName);      AudioClip au = Applet.newAudioClip(url);      return au;    } catch (Exception e) {      e.printStackTrace();    }    return null;  }  //讲解音乐播放的基本技术  private void hello() {    try {      File f = new File("songs//song1.wav");      URL url = f.toURI().toURL();      //URL url = new URL("file:songs//song1.wav");      AudioClip au = Applet.newAudioClip(url);      au.play();      //au.loop();      //au.stop();    } catch (Exception e) {      e.printStackTrace();    }  }  private class MyMouseListener extends MouseAdapter{    @Override    public void mouseClicked(MouseEvent e) {      JButton btn = (JButton) e.getSource();      currentSong.stop();      if(btn==btnPlay){        isPlayOrStop = !isPlayOrStop;      }else if(btn==btnLast){        index--;        if(index<0){          index = strSongNames.length-1;        }        //isPlayOrStop=true;      }else if(btn==btnNext){        index++;        index = index%strSongNames.length;      }else if(btn==btnLoop){        isLoop = !isLoop;      }      if(isPlayOrStop){//播放        playerThread = new Thread( new MusicRun() );        playerThread.start();      }else{//停止        songsList.setSelectedIndex(index);        songNameLabel.setText("停止播放:"+strSongNames[index]);        btnPlay.setIcon( new ImageIcon("images2/2.png"));      }    }  }  private class MusicRun implements Runnable{    @Override    public void run() {      currentSong = songs[index];      if(isLoop){        currentSong.loop();        songNameLabel.setText("循环播放:"+strSongNames[index]);      }      if (isPlayOrStop) {        currentSong.play();      }      //在播放列表中选定当前歌曲      songsList.setSelectedIndex(index);      //把播放按钮的图标切换成“停止”      btnPlay.setIcon( new ImageIcon("images2/5.png"));      if(!isLoop){        songNameLabel.setText("正在播放:"+strSongNames[index]);      }    }  }  public static void main(String[] args) {    new MusicPlayer();  }}