java jfm教程

package com.jmfsample2;




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.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;




public class JMFSample implements ControllerListener {


public static void main(String[] args) {
JMFSample sp

= new JMFSample();
sp.play();
}












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:/E:/c-d.avi”);
}

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();
}

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();
}
}

}

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