使用JMF实现java视频播放器

package com.bird.jmf;import java.awt.BorderLayout;import java.awt.Component;import java.awt.Dimension;import java.awt.Frame;import java.awt.Panel;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.io.IOException;import java.net.MalformedURLException;import java.net.URL;import javax.media.CannotRealizeException;import javax.media.ControllerEvent;import javax.media.ControllerListener;import javax.media.EndOfMediaEvent;import javax.media.Manager;import javax.media.MediaLocator;import javax.media.NoPlayerException;import javax.media.Player;import javax.media.PrefetchCompleteEvent;import javax.media.RealizeCompleteEvent;import javax.media.Time;@SuppressWarnings({ "restriction", "unused" })public class JMFSample implements ControllerListener { public static void main(String[] args) {  JMFSample sp = new JMFSample();  sp.play(); }  private Player mediaPlayer; private Frame f; private Player player; private Panel panel; private Component visual; private Component control = null;  public void play(){  f = new Frame("JMF Sample1");  f.addWindowListener(new WindowAdapter() {   public void windowClosing(WindowEvent we) {    if(player != null) {     player.close();    }    System.exit(0);   }  });  f.setSize(500,400);  f.setVisible(true);  URL url = null;  try {   //准备一个要播放的视频文件的URL   url = new URL("file:/d:/2.mpg");  } catch (MalformedURLException e) {   e.printStackTrace();  }    try {   //通过调用Manager的createPlayer方法来创建一个Player的对象   //这个对象是媒体播放的核心控制对象   player = Manager.createPlayer(url);  } catch (NoPlayerException e1) {   e1.printStackTrace();  } catch (IOException e1) {   e1.printStackTrace();  }   //对player对象注册监听器，能噶偶在相关事件发生的时候执行相关的动作  player.addControllerListener(this);    //让player对象进行相关的资源分配  player.realize(); }  private int videoWidth = 0; private int videoHeight = 0; private int controlHeight = 30; private int insetWidth = 10; private int insetHeight = 30;  //监听player的相关事件 public void controllerUpdate(ControllerEvent ce) {  if (ce instanceof RealizeCompleteEvent) {   //player实例化完成后进行player播放前预处理   player.prefetch();  } else if (ce instanceof PrefetchCompleteEvent) {   if (visual != null)    return;   //取得player中的播放视频的组件，并得到视频窗口的大小   //然后把视频窗口的组件添加到Frame窗口中，   if ((visual = player.getVisualComponent()) != null) {    Dimension size = visual.getPreferredSize();    videoWidth = size.width;    videoHeight = size.height;    f.add(visual);   } else {    videoWidth = 320;   }      //取得player中的视频播放控制条组件，并把该组件添加到Frame窗口中   if ((control = player.getControlPanelComponent()) != null) {    controlHeight = control.getPreferredSize().height;    f.add(control, BorderLayout.SOUTH);   }      //设定Frame窗口的大小，使得满足视频文件的默认大小   f.setSize(videoWidth + insetWidth, videoHeight + controlHeight + insetHeight);   f.validate();      //启动视频播放组件开始播放   player.start();   mediaPlayer.start();  } else if (ce instanceof EndOfMediaEvent) {   //当播放视频完成后，把时间进度条恢复到开始，并再次重新开始播放   player.setMediaTime(new Time(0));   player.start();  } }}