* int result=fileChooser.showOpenDialog(this);//創(chuàng)建文件打開對(duì)話框，并設(shè)定此程序?yàn)楦复翱诒O(jiān)控*/ 

    	/*通過result的值來判斷文件是否打開成功 
    	 * *JFileChooser類有很多靜態(tài)成員變量 
    	 * **/ 
    	/*if(result==JFileChooser.CANCEL_OPTION) 
    	 * { 
    	 * file=null;//file已經(jīng)在類中定義，如果選擇取消，file指向?yàn)榭?
    	 * } 
    	 * else
    	 * 
    	 * { 
    	 * file=fileChooser.getSelectedFile();//獲得文件對(duì)象 
    	 * title=file.getAbsolutePath();//取得文件的絕對(duì)路徑并且賦給title設(shè)定標(biāo)題 
    	 * }*/ 
    	//if(fd==null) 

    	//{ 
    	//String filename="java音頻播放器"; 
    	fd = new FileDialog(MediaPlayer.this); 
    	
    	fd.setVisible(true); 
    	if (fd.getFile() != null) 
    	{ 
    		title = fd.getDirectory() + fd.getFile();//原因請見同目錄下的FileDialogDemo.java文件 
    		files=fd.getFile(); 
    		//dir =fd.getDirectory(); 
    		file=new File(title); 
    		createPlayer(); 
    	} 
    	//title=filename; 
    	//fd=null;//缺少此句如果第一次打開文件的時(shí)候取消操作的時(shí)候第二次也不能打開文件了 
    	//} 
    	
    } 

    private void openDir() 
    { 
    	JFileChooser fileChooser=new JFileChooser(); 
    	fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); 
    	int result=fileChooser.showOpenDialog(MediaPlayer.this);

    	if(result==JFileChooser.CANCEL_OPTION) 
    		return; 
    	file=fileChooser.getSelectedFile(); 
    	
    	if(file==null||file.getName().equals("")) 
    		JOptionPane.showMessageDialog(this,"錯(cuò)誤的路徑", 
    				"出錯(cuò)了",JOptionPane.ERROR_MESSAGE); 
    	String[] sFiles=file.list(); 
    	
    	for(int i=0;i<sFiles.length;i++) 
    	{ 
    		fileName.addElement(sFiles[i]); 
    		numList.addElement((numList.size()+1)+"."+sFiles[i]); 
    		dirName.addElement(file.getAbsolutePath()+"\\"+sFiles[i]); 
    	} 
    	list.setListData(numList); 


    	/*fd=new FileDialog(MediaPlayer.this); 
    	 * fd.setVisible(true); 
    	 * if(fd.getDirectory()!=null) 
    	 * { 
    	 * File fileDir=new File(fd.getDirectory()); 
    	 * String[] ss=fileDir.list(); 
    	 * for(int i=0;i<ss.length;i++) 
    	 * { 
    	 * System.out.println(ss[i]); 
    	 * } 
    	 * }*/ 
     } 


    private void createPlayer() 
    { 
    	closePreviosPlayer();//關(guān)閉先前的媒體播放器 
    	String extendName="此播放器好象不支持"+title.substring(title.lastIndexOf(".")+1)+"格式"; 
    	try 
    	{ 
    		player=Manager.createPlayer(file.toURL());//javax.media.Manager直接繼承于java.lang.object,且它為final,不能被繼承 

    		player.addControllerListener(new ControllerHand()); 
    		player.start(); 
    		addList(files); 
    		index=fileName.size()-1; 
    		list.setSelectedValue(numList.elementAt(index),true); 
    		//list.setSelectedIndex(index); 
    		//list.setSelectionForeground(Color.blue); 
    		setTitle(title); 

    		//addList("files");//到播放清單 
    		//title="file.getAbsoluteFile()"; 

    	} 
    	catch(Exception e) 
    	{ 
    		JOptionPane.showMessageDialog(this,extendName,"出錯(cuò)了!!",JOptionPane.ERROR_MESSAGE); 
    		setTitle(extendName); 
    	} 


    
    } 

    private void closePreviosPlayer() 
    { 
    	if(player==null) 
    		return; 

    	//player.close();//首先停止播放 
    	/* 
    	 * *不能用上面的代碼停止，要用下面的兩行取代，否則Component visual =player.getVisualComponent();發(fā)生異常 
    	 * **/ 
    	player.stop(); 
    	player.deallocate(); //停止播放并且重新裝載DateSource 

    	Component visual =player.getVisualComponent(); 
    	Component control=player.getControlPanelComponent(); 

    	if(visual!=null) 
    	{ 
    		panel.remove(visual); 
    	} 

    	if(control!=null) 
    	{ 
    		panel.remove(control); 
    	} 

    } 


    private class ControllerHand implements ControllerListener 
    { 
    	public void controllerUpdate(ControllerEvent e)
    	{ 
    		if(e instanceof RealizeCompleteEvent) 
    		{ 
    			Component visual=player.getVisualComponent(); //一個(gè)播放所有視頻媒體的可視組件

    			if(visual!=null) 
    			{ 
    				System.out.println("音頻播放器不支持視頻圖象功能"); 
    			    setTitle("音頻播放器不支持視頻圖象功能"); 

    			    //panel.removeAll(); 
    			    //panel.add(visual,BorderLayout.CENTER); 
    			} 
    			/*else 
    			 * { 
    			 * panel.add(label,BorderLayout.CENTER); 
    			 * }*///此else語句可以防止因?yàn)樵瓉聿シ乓曨l圖象后以后沒有界面 


    			Component control=player.getControlPanelComponent();//一個(gè)操作時(shí)間軸的可視組件（包括開始，停止，回放），也包含了一些媒體流的有用信息 
    			//Component voice=player.getGainControl().getControlComponent(); 
    			if(control!=null) 
    			{ 


    				panel.add(control,BorderLayout.SOUTH); 
    			} 
    			
    			//c.validate(); 
    			panel.doLayout(); 
    			return; 
    		} 
    		
    		if (e instanceof EndOfMediaEvent) 
    		{ 
    			/*if (loop) 
    			 * { 
    			 * player.setMediaTime (new Time (0)); 
    			 * player.start (); 
    			 * } 
    			 * return;*/ 
    			if(buttonValues[0].isSelected()) 
    			{ 
    				if(fileName.size()==0) 
    					return; 
    				index=(int)(Math.random()*fileName.size()); 
    			} 
    			
    			if(buttonValues[1].isSelected()) 
    			{ 
    				if(fileName.size()==0) 
    					return;//必須有此if語句，否則當(dāng)用戶把播放列表清空的時(shí)候發(fā)生異常，偶然的機(jī)會(huì)發(fā)現(xiàn)的 
                          //現(xiàn)在感覺測試軟件真是太重要了，看來以后程序做好后要反復(fù)測試，考慮各種情況 
    				index=(index+1)%fileName.size(); 
    			} 

    			if(buttonValues[2].isSelected()) 
    			{ 
    				player.setMediaTime (new Time (0)); 
    				player.start(); 
    			} 
    			createPlayer2(); 

    		} 
    	} 
    } 
   
    private void exity_n() 
    { 
    	int exi; 
    	exi=JOptionPane.showConfirmDialog(this,"真的要離開么？","退出程序",JOptionPane.YES_NO_OPTION, 
    			JOptionPane.QUESTION_MESSAGE); 
    	//if(exi==null) 
    	if(exi==JOptionPane.YES_OPTION) 
    	{ 
    		saveList(); 
    	    setVisible(false);
    	    
    	} 

    	return; 

    } 

    private void addList(String vf) 
    { 
    	//fileReadList=new fileReadList(fdd,) 
    	//try 
    	//{ 
    	//int i=0; 
    	//fileName.addElement((fileName.size()+1)+"."+vf); 
    	fileName.addElement(vf); 
    	numList.addElement((numList.size()+1)+"."+vf); 
    	//fileName.addElement(++i+"."+vf); 
    	dirName.addElement(title); 
    	list.setListData(numList); 
    	//} 
    	/*catch(Exception e) 
    	 * { 
    	 * e.printStackTrace(); 
    	 * //System.out.println(e.getMessage()); 
    	 * }*/ 


    } 

    private void createPlayer2() 
    { 

    	try
    	{
    		title=dirName.elementAt(index).toString();
    	} 
    	//title=dirName.elementAt(index).toString(); 
    	catch(ArrayIndexOutOfBoundsException e) 
    	{return;} 
    	file=new File(title); 
    	closePreviosPlayer();//關(guān)閉先前的媒體播放器 
    	String extendName="此播放器好象不支持"+title.substring(title.lastIndexOf(".")+1)+"格式"; 
    	try 
    	{ 
    		player=Manager.createPlayer(file.toURL());//javax.media.Manager直接繼承于java.lang.object,且它為final,不能被繼承 

    		player.addControllerListener(new ControllerHand()); 
    		player.start(); 
    		//list.setSelectedIndex(index); 
    		list.setSelectedValue(numList.elementAt(index),true); 
    		list.setSelectionForeground(Color.blue); 
    		//list.setSelectedIndex(index); 
    		//addList(files); 
    		setTitle(title); 

    		//addList("files");//到播放清單 

    	} 
    	catch(Exception e) 
    	{ 
    		//JOptionPane.showMessageDialog(this,extendName,"出錯(cuò)了!!",JOptionPane.ERROR_MESSAGE); 
    		//setTitle(extendName); 
    		String ex=null; 
    		try
    		{
    			ex=fileName.elementAt(index).toString(); 
    		} 
    		catch(Exception e1)
    		{
    			return;
    		} 
    		fileName.removeElementAt(index); 
    		numList.removeAllElements(); 
    		Enumeration enumFile=fileName.elements(); 
    		while(enumFile.hasMoreElements()) 
    		{ 
    			numList.addElement((numList.size()+1)+"."+enumFile.nextElement()); 

    		} 

    		dirName.removeElementAt(index); 
    		//list.setListData(fileName); 
    		list.setListData(numList); 


    		System.out.println("已經(jīng)從播放列表中刪除 "+"\""+ex+"\""+" 文件," 
    			+"因?yàn)榇瞬シ牌鞑恢С?quot;+ex.substring(ex.lastIndexOf(".")+1)+"格式," 
    				+"不過沒有從硬盤真正刪除"); 
    		if(numList.size()!=0) 
    		{ 
    			index%=numList.size(); 
    			createPlayer2(); 
    		} 
    	} 

    } 

    private void saveList() 
    { 
    	Enumeration enumFile=fileName.elements(); 
    	Enumeration enumDir =dirName.elements(); 
    	try 
    	{ 
    		output=new ObjectOutputStream(new FileOutputStream(listFile)); 
    		while(enumFile.hasMoreElements()) 
    		{ 
    			listWriteFile=new ListValues(enumFile.nextElement().toString(),enumDir.nextElement().toString()); 
    			output.writeObject(listWriteFile); 
    		} 
    		output.flush(); 
    		output.close(); 

    	} 
    	catch(Exception e) 
    	{
    		e.printStackTrace(); 
        } 
    	/*finally 
    	 * { 
    	 * output.flush(); 
    	 * output.close();//郁悶，這兩行不能寫在這里，實(shí)在是一大遺憾啊，不知道有什么別的方法 
    	 * }*/ 


    } 

    public void run() 
    { 
    	try 
    	{ 
    		Thread.sleep(1); 
    	} 
    	catch(InterruptedException e) 
    	{ 
    		
    	} 

    	try 
    	{ 
    		if(!listFile.exists()) 
    			listFile.createNewFile();//防止不存在此文件發(fā)生讀取錯(cuò)誤，這兩行代碼保證不存在的情況下自動(dòng)建立 
    		input=new ObjectInputStream(new FileInputStream(listFile)); 
    		while(true) 
    		{ 
    			listWriteFile=(ListValues)input.readObject(); 
    			fileName.addElement(listWriteFile.getFileName()); 
    			numList.addElement((numList.size()+1)+"."+listWriteFile.getFileName()); 
    			dirName.addElement(listWriteFile.getDirName()); 

    		} 
    	} 
    	catch(EOFException e) 
    	{ 
    		try 
    		{ 
    			if(!fileName.isEmpty()) 
    				input.close();//確認(rèn)有元素存在并加載完畢后關(guān)閉輸入流 
    		} 
    		catch(IOException e1) 
    		{ 
    			JOptionPane.showMessageDialog(MediaPlayer.this,"文件被非正常關(guān)閉", 
    					"非法關(guān)閉",JOptionPane.ERROR_MESSAGE); 
    		} 

    	} 
    	catch(ClassNotFoundException e) 
    	{ 
    		JOptionPane.showMessageDialog(MediaPlayer.this,"不能創(chuàng)建對(duì)象","對(duì)象創(chuàng)建失敗",JOptionPane.ERROR_MESSAGE); 
    	} 
    	catch(IOException e) 
    	{ 
    		JOptionPane.showMessageDialog(MediaPlayer.this,"不能讀取文件", 
    				"讀取文件失敗",JOptionPane.ERROR_MESSAGE); 
    	} 
    	finally 
    	{ 
    		if(dirName.isEmpty())//防止Vector越界 
    			{ 
    			return; 
    			} 
    		index=(int)(Math.random()*(fileName.size()));//產(chǎn)生隨即數(shù)，進(jìn)行隨即播放 
    		list.setListData(numList); 
    		//list.setListData(fileName); 
    		//list.setSelectedValue(fileName.elementAt(index),true); 
    		//list.ensureIndexIsVisible(index);//確保選擇項(xiàng)可以看見 
    		//list.setSelectionForeground(Color.green); 
    		createPlayer2(); 
    	} 

    } 
    
    private void checkMenu(MouseEvent e) 
    { 

    	if(e.isPopupTrigger()) 
    	{ 
    		indexForDel=list.locationToIndex(e.getPoint()); 
    		int[] selected={index,indexForDel}; 
    		//Point p=new Point(e.getX(),e.getY()); 

    		list.setSelectedIndices(selected); 
    		popupMenu.show(list,e.getX(),e.getY()); 

    	} 
    	//list.setSelectedIndex(index); 
    } 

    String reNames() throws ReName//文件該函數(shù) 
    { 
    	String name=JOptionPane.showInputDialog(this,"請輸入新的名字",fileName.elementAt(indexForDel)); 
    	if(name==null||name.equals("")) throw new ReName(); 
    	//必須把name==null放在前面，否則會(huì)發(fā)生NullPointerExceptin，這個(gè)很好理解， 
    	//當(dāng)按了取消后，name會(huì)成為空，那么name.equals("")就會(huì)發(fā)生異常 
    	return name; 
    } 
    class ReName extends Exception//自定義異常來處理文件該名的時(shí)候發(fā)生輸入為空的情形 
    { 
    	
    } 


}