package musicplayer;import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.util.Properties;import java.io.FileInputStream;import java.io.File;public class MusicFrame extends JFrame {  protected MusicBase pBase = null;  protected String searchDir = null;  protected int curPlayListLength = 0;  static final String MUSIC_DIR_PROPERTY = "musicdir";  static final String DEFAULT_DIR = "music";  static final String CONFIG_FILE_NAME = "play.ini";  private JPanel refContentPane;  private JMenuBar playerMenu = new JMenuBar();  private JMenu menuFile = new JMenu();  private JMenuItem menuFileExit = new JMenuItem();  private JMenu menuHelp = new JMenu();  private JMenuItem menuHelpAbout = new JMenuItem();  private JPanel listPanel = new JPanel();  private  JPanel buttonPanel = new JPanel();  private  JButton prevBttn = new JButton();  JButton playBttn = new JButton();  JButton pauseBttn = new JButton();  JButton stopBttn = new JButton();  JList filenamesList = new JList();  JButton nextBttn = new JButton();  public MusicFrame() {    enableEvents(AWTEvent.WINDOW_EVENT_MASK);    try {      guiInit();      logicInit();      pBase = new MusicBase();    }    catch(Exception e) {      e.printStackTrace();    }  }  private void guiInit() throws Exception  {    refContentPane = (JPanel) this.getContentPane();    refContentPane.setLayout(new BorderLayout());    this.setSize(new Dimension(400, 300));    this.setTitle("Java音頻播放器");    menuFile.setText("文件");    menuFileExit.setText("退出");    menuFileExit.addActionListener(new ActionListener()  {      public void actionPerformed(ActionEvent e) {        menuFileExitClick(e);      }    });    menuHelp.setText("幫助");    menuHelpAbout.setText("關于");    menuHelpAbout.addActionListener(new ActionListener()  {      public void actionPerformed(ActionEvent e) {        menuHelpAboutClick(e);      }    });    buttonPanel.setPreferredSize(new Dimension(30, 100));    buttonPanel.setLayout(new GridLayout());    prevBttn.setText( "后退");    prevBttn.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        prevClick(e);      }    });    playBttn.setText( "播放");    playBttn.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        playClick(e);      }    });     pauseBttn.setText( "暫停");     pauseBttn.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        pauseClick(e);      }    });     stopBttn.setText( "停止");     stopBttn.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        stopClick(e);      }    });    nextBttn.setText( "前進");    nextBttn.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        nextClick(e);      }    });    filenamesList.setToolTipText("可播放音樂文件的清單");    listPanel.setLayout(new BorderLayout());    menuFile.add(menuFileExit);    menuHelp.add(menuHelpAbout);    playerMenu.add(menuFile);    playerMenu.add(menuHelp);    this.setJMenuBar(playerMenu);    refContentPane.add(listPanel, BorderLayout.CENTER);    listPanel.add(filenamesList,  BorderLayout.CENTER);    refContentPane.add(buttonPanel, BorderLayout.SOUTH);    buttonPanel.add(prevBttn, null);    buttonPanel.add(playBttn, null);    buttonPanel.add(pauseBttn, null);    buttonPanel.add(stopBttn, null);    buttonPanel.add(nextBttn, null);  }  private void logicInit() {    Properties myProp = null;    FileInputStream inFileStream = null ;    searchDir = DEFAULT_DIR;    try {        inFileStream = new FileInputStream(new File(CONFIG_FILE_NAME));        myProp = new Properties();        myProp.load(inFileStream);      } catch (Exception ex)          { System.out.println("不能訪問配置文件");  }    if (myProp != null)  {     searchDir = myProp.getProperty(MUSIC_DIR_PROPERTY,DEFAULT_DIR);     }     File tpDir = new File(searchDir);     if (tpDir.isDirectory()) {        String [] tpFiles = tpDir.list(new java.io.FilenameFilter() {           public boolean accept(File indir, String inName) {              String lcName = inName.toLowerCase();              if (lcName.endsWith("ogg") || lcName.endsWith("mp3")                || lcName.endsWith("wav"))                return true;              else               return false;           }        });        DefaultListModel dm = new DefaultListModel();        curPlayListLength = tpFiles.length;        for (int i=0; i<curPlayListLength; i++)          dm.addElement(tpFiles[i]);       filenamesList.setModel(dm);     }  }  public void menuFileExitClick(ActionEvent e) {    pBase.endThread();    System.exit(0);  }  public void menuHelpAboutClick(ActionEvent e) {    AboutBox dlg = new AboutBox(this);    Dimension dlgSize = dlg.getPreferredSize();    Dimension frmSize = getSize();    Point loc = getLocation();    dlg.setLocation((frmSize.width - dlgSize.width) / 2 + loc.x, (frmSize.height - dlgSize.height) / 2 + loc.y);    dlg.setModal(true);    dlg.show();  }  protected void processWindowEvent(WindowEvent e) {    super.processWindowEvent(e);    if (e.getID() == WindowEvent.WINDOW_CLOSING) {      menuFileExitClick(null);    }  }  void playClick(ActionEvent e) {   String fileToPlay = (String) filenamesList.getSelectedValue();   if (fileToPlay != null) {        pBase.playFile(searchDir + System.getProperty("file.separator") + fileToPlay);   }  } void stopClick(ActionEvent e) {   pBase.stop();  } void pauseClick(ActionEvent e) {   pBase.pause();  }  void prevClick(ActionEvent e) {    pBase.stop();    filenamesList.setSelectedIndex(   filenamesList.getSelectedIndex() - 1);    playClick(e);  }  void nextClick(ActionEvent e) {    pBase.stop();    filenamesList.setSelectedIndex(   (filenamesList.getSelectedIndex() + 1) % curPlayListLength);   playClick(e);  }}