動機是要在PDA上能播放媒體影像    引用此處的程式碼    http://www.kupage.com/webdesign/8/20030711/1458230000027nxtk2o1.htm

import javax.media.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;    class mplayer extends Frame implements ActionListener,ControllerListener, ItemListener
{
    Player player;
    Component vc, cc;
    boolean first = true, loop = false;
    String currentDirectory;      mplayer (String title)
  {
    super (title);
    addWindowListener(new WindowAdapter ()
    {
      public void windowClosing (WindowEvent e)
      {
        // 用戶點擊窗口系統菜單的關閉按鈕
        // 調用dispose以執行windowClosed
        dispose ();
      }
      public void windowClosed (WindowEvent e)
      {
        if (player != null)
          player.close ();
        System.exit (0);
       }
    });
    Menu m = new Menu ("文件");
    MenuItem mi = new MenuItem ("打開");
    mi.addActionListener (this);
    m.add (mi);
    m.addSeparator ();
/*    CheckboxMenuItem cbmi = new CheckboxMenuItem ("循環", false);
    cbmi.addItemListener (this);
    m.add (cbmi);
    m.addSeparator ();*/
    mi = new MenuItem ("退出");
    mi.addActionListener (this);
    m.add (mi);
    MenuBar mb = new MenuBar ();
    mb.add (m);
    setMenuBar (mb);
    setSize (200, 200);
    setVisible (true);
  }
  public void actionPerformed (ActionEvent e)
  {
    if (e.getActionCommand ().equals ("退出"))
    {
      // 調用dispose以便執行windowClosed
      dispose ();
      return;
    }
    FileDialog fd = new FileDialog (this, "打開媒體文件",FileDialog.LOAD);
    fd.setDirectory (currentDirectory);
    fd.show ();
    // 如果用戶放棄選擇文件，則返回
    if (fd.getFile () == null) return;
      currentDirectory = fd.getDirectory ();
    if (player != null)
    player.close ();
    try
    {
      player = Manager.createPlayer (new MediaLocator ("file:" + fd.getDirectory () + fd.getFile ()));
    }
    catch (java.io.IOException e2)
    {
      System.out.println (e2);
      return;
    }        catch (NoPlayerException e2)
    {
      System.out.println ("不能找到播放器.");
      return;
     }
    if (player == null)
    {
      System.out.println ("無法創建播放器.");
      return;
    }
    first = false;
    setTitle (fd.getFile ());
    player.addControllerListener (this);
    player.prefetch ();
  }      public void controllerUpdate (ControllerEvent e)
  {
    // 調用player.close()時ControllerClosedEvent事件出現。
    // 如果存在視覺部件，則該部件應該拆除（為一致起見，
    // 我們對控制面板部件也執行同樣的操作）
    if (e instanceof ControllerClosedEvent)
    {
      if (vc != null)
      {
        remove (vc);
        vc = null;
      }
      if (cc != null)
      {
        remove (cc);
        cc = null;
      }
      return;
    }
    if (e instanceof EndOfMediaEvent)
    {
      if (loop)
      {
        player.setMediaTime (new Time (0));
        player.start ();
      }
      return;
    }
    if (e instanceof PrefetchCompleteEvent)
    {
      player.start ();
      return;
    }
    if (e instanceof RealizeCompleteEvent)
    {
      vc = player.getVisualComponent ();
      if (vc != null)
        add (vc);
      cc = player.getControlPanelComponent ();
      if (cc != null)
        add (cc, BorderLayout.SOUTH);
      pack ();
    }
  }
  public void itemStateChanged (ItemEvent e)
  {
    loop = !loop;
  }
  public void paint (Graphics g)
  {
    if (first)
    {
      int w = getSize ().width;
      int h = getSize ().height;
      g.setColor (Color.blue);
      g.fillRect (0, 0, w, h);
      Font f = new Font ("DialogInput", Font.BOLD, 16);
      g.setFont (f);
      FontMetrics fm = g.getFontMetrics ();
      int swidth = fm.stringWidth ("*** 歡迎 ***");
      g.setColor (Color.white);
      g.drawString ("*** 歡迎 ***",(w - swidth) / 2,(h + getInsets ().top) / 2);
    }
    // 調用超類Frame的paint()方法，該paint()方法將調用Frame包含的各個容器
    // 和部件（包括控制面板部件）的paint()方法。
    super.paint (g);
  }
  // 不執行背景清除操作，以免控制面板部件閃爍
  public void update (Graphics g)
  {
    paint (g);
  }
  public static void main (String [] args)
  {
  new mplayer ("Media Player");
  }
}

但在 編譯時能通過 執行時 卻無法動作出現錯誤 (附圖) 麻煩高手們協助 我使用的是 j2sdk1.4.2_07 環境變數設定 PATH為 C:\j2sdk1.4.2_07\bin;C:\pjee3.1\bin;C:\pjee3.1\lib 在安裝 JMF 2.1.1e 之後 它多了CLASSPATH 在它後面又加上了下列 C:\pjee3.1\lib;C:\pjee3.1\bin 是不是有多餘的路徑？ 還是它會影響在 "命令提示字元"下(如上附圖) 指令中，再指定的路徑？ 我把 jmf.jar & swingall_fix.jar 放在c:\pjee3.1\bin 下是否有誤？ 附圖中出現的錯誤 不解它是說明何意

我試用以 jdk 1.1.8 及 pjee 3.0.2 再去編譯執行 但在執行時出現以下錯誤 可聽到聲音 但看不到影像~  用 Personal Java 撰寫在 PDA (Pocker PC) 上的播放媒體影像程式它的可行性如何??? 煩請高手們指導一番 !!

我已找出"awtLocalization_zh_TW"此class 我將它包入了 d:\pjee3.0\bin\classes.zip內 有同放在 sun\awt\windows\下 但仍會出現 can't find resource for sun.awt.windows.awtLocazation_zh_TW Using default MenuItem font 同上圖

有沒有人能夠協助解決這個問題?? 即使是問題所在的可能，也能提出您的意見!!! 已經不知該怎麼動了 ><"

以下是一般的JDK + JMF,至於PJEE,我正下載來用,試完再跟你說. ======================================================= 我是在自己的pc上安裝JMF,還沒實驗在網路上供人下載的applet會有什麼反應 不過你要先安裝jmf2.1 -->http://java.sun.com/products/java-media/jmf/2.1.1/download.html 下載jmf-2_1_1e-windows-i586.exe,下去安裝在你的pc. 之後,把jmf.jar設定到你的IDE本專案的classes屬性之後.把以下的sample code compile就可以看到好看的了 (沒辦法.不這樣.我真的提不起勁) 以下是我找到的sample  ========================================================

import java.applet.Applet;
import java.awt.*;
import java.lang.String;
import java.net.URL;
import java.net.MalformedURLException;
import java.io.IOException;
import javax.media.*;    /**
 * This is a Java Applet that demonstrates how to create a simple
 * media player with a media event listener.  It will play the
 * media clip right away and continuously loop.
 *
 * <!-- Sample HTML 
 * <applet code=TypicalPlayerApplet width=320 height=300> 
 * 
 * </applet>
 * -->
 */        public class TypicalPlayerApplet extends Applet implements 
ControllerListener
{
   // media player    
   Player player = null;  
   // component in which video is playing             
   Component visualComponent  = null;   
   // controls gain, position, start, stop
   Component controlComponent = null;   
   // displays progress during download
   Component progressBar      = null;         /**
    * Read the applet file parameter and create the media
    * player.
    */       public void init() 
   {
      setLayout(new BorderLayout());
      // input file name from html param
      String mediaFile = null;        
      // URL for our media file
      URL url = null;  
      // URL for doc containing applet               
      URL codeBase = getDocumentBase();            // Get the media filename info.
      // The applet tag should contain the path to the
      // source media file, relative to the html page.          if ((mediaFile = getParameter("FILE")) == null)
         Fatal("Invalid media file parameter");          try 
      {
         // Create an url from the file name and the url to the 
         // document containing this applet.             if ((url = new URL(codeBase, mediaFile)) == null)
            Fatal("Can't build URL for " + mediaFile);
        
         // Create an instance of a player for this media
         if ((player = Manager.createPlayer(url)) == null)
            Fatal("Could not create player for "+url);             // Add ourselves as a listener for player's events
            player.addControllerListener(this);
      } 
      catch (MalformedURLException u) 
      {
         Fatal("Invalid media file URL!");
      } 
      catch(IOException i) 
      {
         Fatal("IO exception creating player for "+url);
      }catch(Exception exp){
        exp.printStackTrace();
        
      }          // This applet assumes that its start() calls  
      // player.start().This causes the player to become
      // Realized. Once Realized, the Applet will get
      //  the visual and control panel components and add 
      // them to the Applet.  These components are not added
      // during init() because they are long operations that
      // would make us appear unresposive to the user.
   }       /**
    * Start media file playback.  This function is called the 
    * first time that the Applet runs and every
    * time the user re-enters the page.
    */           public void start() 
   {
      // Call start() to prefetch and start the player.          if (player != null) player.start();
   }       /**
    * Stop media file playback and release resources before
    * leaving the page.
    */       public void stop() 
   {
      if (player != null)
      {
         player.stop();
         player.deallocate();
      }
   }       /**
    * This controllerUpdate function must be defined in order
    * to implement a ControllerListener interface.  This
    * function will be called whenever there is a media event.
    */       public synchronized void controllerUpdate(ControllerEvent event) 
   {
      // If we're getting messages from a dead player, 
      // just leave          if (player == null) return;          // When the player is Realized, get the visual
      // and control components and add them to the Applet          if (event instanceof RealizeCompleteEvent) 
      {
         if ((visualComponent = player.getVisualComponent()) != null)
            add("Center", visualComponent);
         if ((controlComponent = player.getControlPanelComponent()) != null)
            add("South",controlComponent);
            // force the applet to draw the components
            validate();
      }
      else if (event instanceof CachingControlEvent) 
      {             // Put a progress bar up when downloading starts,
         // take it down when downloading ends.             CachingControlEvent  e = (CachingControlEvent) event;
         CachingControl      cc = e.getCachingControl();
         long cc_progress       = e.getContentProgress();
         long cc_length         = cc.getContentLength();              // Add the bar if not already there ...             if (progressBar == null)  
            if ((progressBar = cc.getProgressBarComponent()) != null) 
            {
               add("North", progressBar);
               validate();
            }             // Remove bar when finished ownloading 
         if (progressBar != null)  
            if (cc_progress == cc_length) 
            {
               remove (progressBar);
               progressBar = null;
               validate();
            }
      }
      else if (event instanceof EndOfMediaEvent) 
      {
         // We've reached the end of the media; rewind and
         // start over             player.setMediaTime(new Time(0));
         player.start();
      }
      else if (event instanceof ControllerErrorEvent) 
      {
         // Tell TypicalPlayerApplet.start() to call it a day             player = null;
         Fatal (((ControllerErrorEvent)event).getMessage());
      }
   }       void Fatal (String s) 
   {
      // Applications will make various choices about what
      // to do here.  We print a message and then exit          System.err.println("FATAL ERROR: " + s);
      throw new Error(s);  // Invoke the uncaught exception
                           // handler System.exit() is another 
                           // choice
   }
}

================================================================== html 崁入: ========================================

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Big5">
<title>
HTML Test Page
</title>
</head>
<body>
mediatest.TypicalPlayerApplet will appear below in a Java enabled browser.
<applet
  codebase = "."
  code     = "mediatest.TypicalPlayerApplet.class"
  name     = "TestApplet"
  width    = "400"
  height   = "300"
  hspace   = "0"
  vspace   = "0"
  align    = "middle"
  FILE= "file:///G:/AV區/mov09.mpg" <---別跟我要這檔.已經在本實驗後自行刪除了
>
</applet>
</body>
</html>
=========================================    

至於你是寫成JFrame的方式,應該更沒問題了 至於在PDA上.請參考以下的討論: http://forum.java.sun.com/thread.jspa?forumID=28&threadID=304316 本機的網頁上是可以看到有在play. 發表人 - neoart 於 2005/04/04 03:37:42

3Q neoart 版主的協助!! 在一般java環境是可以播放影像的  我在使用j2sdk1.4.2_07 + pjee3.1 下出現這樣↓  的錯誤~ 我再try 以jdk 1.1.8 + pjee 3.0.2 則出現 找不到"awtLocalization_zh_TW"此class的錯誤，此時僅能聽到聲音，影像無法呈現 now 既時我從1.4.2_07 中找出該class，但它卻視若無睹，仍出現找不到的錯誤＠＠！ 發表人 - AndyC 於 2005/04/06 23:03:53

Dear AndyC: 首先在此對於無法解決你的問題,感到非常抱歉,畢竟,JME/personal java不是敝人專擅所在 所以我正打算調一台iPAQ來試. 你有沒有試過J2ME的jbuilder 套件 -- "Mobile Set"呢? 那一套系列是可以模擬手機的環境放映mpeg的方式. 至於"Unable To Handle Format: MPEG...."的訊息.我也有在一種請況看過: PC A 為web server,PC B 從 A 的站台的url打開applet viewer去看jmf放映, 在沒有安裝 "jmf-2_1_1e-windows-i586.exe" 時,就會在java 主控台看到這樣的錯誤訊息. 所以,在下推敲是---PJEE跟JMF之間沒有關連到,要不要把jmf的DLL & JARs copy到 PJEE去呢? 畢竟,模擬器還是有差的.有機會拿到PDA,也許可以試出來.

感謝版主 neoart 大力協助 因最近在準備一些其它的東西 Personal Java 被我暫時擱著 @@! (挫折感真重) 稍後再回頭繼續和它奮鬥 有任何訊息 隨時向您討教! 謝~

錯誤訊息似乎是代表著找不到jmfjawt.dll檔 在網路曾找過相似的訊息，但不一定代表是這個錯誤 但是我也只能朝著這個方向去debug 有試過用System.load以及System.loadLibrary的方式去 但總是出現jmfjawt cannot find in shared path 另外試過JNI的方式去load dll檔 但是，似乎有點矛盾... 以JNI來講....我們得自己用C撰寫DLL檔 但是...DLL已經存在，因為是jmf提供的.... 一般Java執行jmfjawt要找的.h檔..我找不到..也不了解 因此在這邊整個卡住了... 是否能有辦法去Load 這個jmfjawt.dll的方法呢?? 能否請高手們指導一下