mdiapp.java

java经典的源代码 我非常喜欢这个源代码 对于编程很有好处

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 {
   public static void main(String args[]) {
        MDIApp mdi = new MDIApp();
    }
    static void Fatal(String s) {
        MessageBox mb = new MessageBox("JMF Error", s);
    }    
    JMFrame jmframe = null;
    JDesktopPane desktop;
    FileDialog fd = null;
    CheckboxMenuItem cbAutoLoop = null;
    Player player = null;
    Player newPlayer = null;
    String filename;
    public MDIApp() {
        super("Java Media Player");
        setLayout( new BorderLayout() );
        desktop = new JDesktopPane();
        desktop.setDoubleBuffered(true);
        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);
        Menu mnOptions = new Menu("Options");
        cbAutoLoop = new CheckboxMenuItem("Auto replay");
        cbAutoLoop.setState(true);
        mnOptions.add(cbAutoLoop);
        mb.add(mnFile);
        mb.add(mnOptions);
        return mb;
    }	
    public void openFile(String filename) {
        String mediaFile = filename;
        Player player = null;
        // URL for our media file
        URL url = null;
        try {
            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);
            } catch (NoPlayerException e) {
                Fatal("Error: " + e);
            }
        } catch (MalformedURLException e) {
            Fatal("Error:" + e);
        } catch (IOException e) {
            Fatal("Error:" + e);
        }
        if (player != null) {
            this.filename = filename;
            JMFrame jmframe = new JMFrame(player, filename);
            desktop.add(jmframe);
        }
    }
}

class JMFrame extends JInternalFrame implements ControllerListener {
    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();
        }
    }
}