import javax.media.*;
import com.sun.media.ui.*;
import javax.media.protocol.*;
import javax.media.protocol.DataSource;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import java.util.Vector;
public class MDIApp extends Frame
{
/*************************************************************************
* MAIN PROGRAM / STATIC METHODS
*************************************************************************/
public static void main(String args[])
{
MDIApp mdi = new MDIApp();
}
static void Fatal(String s)
{
MessageBox mb = new MessageBox("JMF Error", s);
}
/*************************************************************************
* VARIABLES
*************************************************************************/
JMFrame jmframe = null;
JDesktopPane desktop;
FileDialog fd = null;
CheckboxMenuItem cbAutoLoop = null;
Player player = null;
Player newPlayer = null;
String filename;
/*************************************************************************
* METHODS
*************************************************************************/
public MDIApp()
{
super("Java Media Player");
// Add the desktop pane
setLayout( new BorderLayout() );
desktop = new JDesktopPane();
desktop.setDoubleBuffered(true);//设置双缓存
add("Center", desktop);
setMenuBar(createMenuBar());
setSize(640, 480);
setVisible(true);
try
{
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
}
catch (Exception e)
{
System.err.println("Could not initialize java.awt Metal lnf");
}
addWindowListener( new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
} );
Manager.setHint(Manager.LIGHTWEIGHT_RENDERER, new Boolean(true));
}
private MenuBar createMenuBar()
{
ActionListener al = new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
String command = ae.getActionCommand();
if (command.equals("Open"))
{
if (fd == null)
{
fd = new FileDialog(MDIApp.this, "Open File",
FileDialog.LOAD);
fd.setDirectory("/movies");
}
fd.show();
if (fd.getFile() != null)
{
String filename = fd.getDirectory() + fd.getFile();
openFile("file:" + filename);
}
}
else if (command.equals("Exit"))
{
dispose();
System.exit(0);
}
}
};
MenuItem item;
MenuBar mb = new MenuBar();
// File Menu
Menu mnFile = new Menu("File");
mnFile.add(item = new MenuItem("Open"));
item.addActionListener(al);
mnFile.add(item = new MenuItem("Exit"));
item.addActionListener(al);
// Options Menu
Menu mnOptions = new Menu("Options");
cbAutoLoop = new CheckboxMenuItem("Auto replay");
cbAutoLoop.setState(true);
mnOptions.add(cbAutoLoop);
mb.add(mnFile);
mb.add(mnOptions);
return mb;
}
/**
* Open a media file.
*/
public void openFile(String filename)
{
String mediaFile = filename;
Player player = null;
// URL for our media file
URL url = null;
try
{
// Create an url from the file name and the url to the
// document containing this applet.
if ((url = new URL(mediaFile)) == null)
{
Fatal("Can't build URL for " + mediaFile);
return;
}
// Create an instance of a player for this media
try
{
player = Manager.createPlayer(url);//创建播放器
}
catch (NoPlayerException e)
{
Fatal("Error: " + e);
}
}
catch (MalformedURLException e)
{
Fatal("Error:" + e);
}
catch (IOException e)
{
Fatal("Error:" + e);
}
if (player != null)
{
this.filename = filename;//保存文件名称
JMFrame jmframe = new JMFrame(player, filename);//新建立一个播放窗口
desktop.add(jmframe);
}
}
}
class JMFrame extends JInternalFrame implements ControllerListener
{//播放器
Player mplayer;
Component visual = null;
Component control = null;
int videoWidth = 0;
int videoHeight = 0;
int controlHeight = 30;
int insetWidth = 10;
int insetHeight = 30;
boolean firstTime = true;
public JMFrame(Player player, String title)
{
super(title, true, true, true, true);
getContentPane().setLayout( new BorderLayout() );
setSize(320, 10);
setLocation(50, 50);
setVisible(true);
mplayer = player;
mplayer.addControllerListener((ControllerListener) this);
mplayer.realize();
addInternalFrameListener( new InternalFrameAdapter()
{
public void internalFrameClosing(InternalFrameEvent ife)
{
mplayer.close();
}
}
);
}
public void controllerUpdate(ControllerEvent ce)
{
if (ce instanceof RealizeCompleteEvent)
{
mplayer.prefetch();
}
else if (ce instanceof PrefetchCompleteEvent)
{
if (visual != null)
return;
if ((visual = mplayer.getVisualComponent()) != null)
{
Dimension size = visual.getPreferredSize();
videoWidth = size.width;
videoHeight = size.height;
getContentPane().add("Center", visual);
}
else
videoWidth = 320;
if ((control = mplayer.getControlPanelComponent()) != null)
{
controlHeight = control.getPreferredSize().height;
getContentPane().add("South", control);
}
setSize(videoWidth + insetWidth,videoHeight + controlHeight + insetHeight);
validate();
mplayer.start();
}
else if (ce instanceof EndOfMediaEvent)
{
mplayer.setMediaTime(new Time(0));
mplayer.start();
}
}
}
问题：如何结合Swing组件使用JMF。Swing组件是轻量级组件，而JMF默认使用的是重量级组件（它们可以为高速率的视频使用本地的绘制方法）。
解决方案：
JMF2.0包含了几个不同的视频绘制器，可以强制让播放器使用轻量级组件。示例如下：
Manager.setHint(Manager.LIGHTWEIGHT_RENDERER, new Boolean(true));
这在内部是通过PlugInManager来使其只能使用轻量级绘制器，此后创建的任何播放器都将使用轻量级绘制器。注意的是存在父容器中的组件的双缓存功能应该要开启。
本文转自Phinecos(洞庭散人)博客园博客，原文链接：http://www.cnblogs.com/phinecos/archive/2007/09/22/902864.html，如需转载请自行联系原作者
