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Thread: Music player problem

  1. #1
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    Unhappy Music player problem

    Hi I made a small music player. But when I select the file the windows does not turn up but the music plays in the background and I get these exceptions

    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at Musique.openFile(Musique.java:72)
    at Musique.init(Musique.java:37)
    at TaskPanel.actionPerformed(TaskPanel.java:43)
    at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:1995)
    at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2318)
    at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(BasicButtonListener.java:236)
    at java.awt.Component.processMouseEvent(Component.jav a:6134)
    at javax.swing.JComponent.processMouseEvent(JComponen t.java:3265)
    at java.awt.Component.processEvent(Component.java:589 9)
    at java.awt.Container.processEvent(Container.java:202 3)
    at java.awt.Component.dispatchEventImpl(Component.jav a:4501)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2081)
    at java.awt.Component.dispatchEvent(Component.java:43 31)
    at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4299)
    at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:3963)
    at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:3893)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2067)
    at java.awt.Window.dispatchEventImpl(Window.java:2458 )
    at java.awt.Component.dispatchEvent(Component.java:43 31)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java: 599)
    at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:284)
    at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:122)

    import java.io.*;
    import java.io.FileInputStream.*;
    import java.awt.*;
    import javax.swing.JInternalFrame;
    import javax.swing.UIManager.*;
    import javax.swing.event.InternalFrameEvent;
    import javax.media.*;
    import com.sun.media.ui.*;
    import java.net.*;
    import javax.swing.event.InternalFrameAdapter;
     
    class Musique implements ControllerListener
    { String filename;
        FileDialog fd;
        public void init()
        { core c = new core();
            if (fd == null) 
                            {
                                fd = new FileDialog(c,"Open File",
    						       FileDialog.LOAD);
                            	fd.setDirectory("/movies");
                            }
                            fd.show();
                                if (fd.getFile() != null) {
                                String filename = fd.getDirectory() + fd.getFile();
                                openFile("file:" + filename);
    		    }
     
     
        }           
    public void openFile(String filename) {
        //writepadstart w = new writepadstart();
     
    	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);
    	    } catch (NoPlayerException e) {
    		Fatal("Error: " + e);
    	    }
    	} catch (MalformedURLException e) {
    	    Fatal("Error:" + e);
    	} catch (IOException e) {
    	    Fatal("Error:" + e);
    	}
    	if (player != null) {
                core c = new core();
    	    this.filename = filename;
    	    JMFrame1 jmframe = new JMFrame1(player, filename);
    	    c.cont.add(jmframe);
                jmframe.moveToFront();
                jmframe.setClosable(true);
                jmframe.setMaximizable(true);
                jmframe.setIconifiable(true);
                jmframe.setResizable(true);
                jmframe.show();
     
    	}
        }
     
        static void Fatal(String s) {
    	MessageBox mb = new MessageBox("JMF Error", s);
        }    
     
        public void controllerUpdate(ControllerEvent arg0) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
     
    }
     
     
    class JMFrame1 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;
     
        JMFrame1(Player player, String title) {
     
    	getContentPane().setLayout( new BorderLayout() );
    	setSize(320, 10);
    	setLocation(50, 50);
    	setVisible(true);
    	mplayer = player;
    	mplayer.addControllerListener((ControllerListener) this);
    	mplayer.realize();
    	addInternalFrameListener( new InternalFrameAdapter() {
                @Override
    	    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();
    	}
        }
    }


  2. #2
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    Default Re: Music player problem

    Hi What is core in there?

    I am unable to resolve it.

    Is it some extra class have designed.

    Then send its code.

  3. #3
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    Default Re: Music player problem

    /* Codename 'Puma' (I like cats and dogs)
     * Build Core 2 Build 1
     * Build 1 Date: 26/01/2010
     * 
     * A Java Based Desktop Environment For Windows, Macintosh and Linux.
     * Created by Abhinav Sunil Hardikar.
     * 
     * About me:
     * I am 17 year old guy in the 11 grade. Studying Java from a book I have successfully 
     * made Core 1 Build 1 to 8. Just search for "Java Based desktop environment" on google
     * and select the ubuntuforums link for more information.
     * 
     * [LOG]
     * Scrapped Core 1 Build 8 architecture
     * New Core architecture design implemented.
     * 
     */
     
    import java.io.*;
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import javax.swing.UIManager.LookAndFeelInfo;
    import java.io.*;
    import java.io.FileInputStream.*;
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import javax.swing.JInternalFrame;
    import javax.swing.UIManager.*;
    import javax.swing.event.ChangeEvent;
    import javax.swing.event.ChangeListener;
    import javax.swing.event.InternalFrameEvent;
    import javax.swing.event.InternalFrameListener;
    import javax.swing.event.ListSelectionEvent;
    import javax.swing.event.ListSelectionListener;
    import javax.swing.table.DefaultTableModel;
    import javax.media.*;
    import com.sun.media.ui.*;
    import javax.media.protocol.*;
    import javax.media.protocol.DataSource;
    import java.util.Vector;
    import java.net.*;
    import javax.swing.event.InternalFrameAdapter;
     
     
    class core extends JFrame
    {
        // DECLARATIONS
     
            JMenu menu;
            JMenuBar menubar;
            JMenuItem menuitem;
            JDesktopPane dpane;
            Container cont;
            JLabel wallpaper;
        // END OF DECLARATIONS
        public void init()
        {      
            // INITIALIZATIONS
             Manager.setHint(Manager.LIGHTWEIGHT_RENDERER, new Boolean(true));
            Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
            TaskPanel tsk = new TaskPanel();
            menu = new JMenu("File");
            menubar = new JMenuBar();
            dpane = new JDesktopPane();
            cont = getContentPane();
            ImageIcon im = new ImageIcon("c:\\wallpaper\\puma3.jpg");
            Image img = im.getImage();
            Image wall = img.getScaledInstance(screenSize.width, screenSize.height,  java.awt.Image.SCALE_SMOOTH);  
            ImageIcon newWall = new ImageIcon(wall); 
            wallpaper = new JLabel(newWall, JLabel.CENTER);
            //wallpaper.moveToBack();
     
            //END OF INITIALIZATIONS
     
     
            //dpane.add(n.jmframe);
            //cont.add(n);
            menubar.add(menu);
            menu.add(new JMenuItem("Menu"));
            cont.add(menubar, BorderLayout.NORTH);
            tsk.content();
            cont.add(tsk, BorderLayout.SOUTH);
     
            wallpaper.setSize(getSize());
            cont.add(wallpaper);
     
            cont.add(dpane);
            /*JMFrame1 n = new JMFrame1();
            n.init();*/
        }
    }
    class Puma
    {
        public static void main(String args[])
        {   
            try
            {   Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
                UIManager.setLookAndFeel("com.seaglasslookandfeel.SeaGlassLookAndFeel");
                /*for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels())
                         {
                             if ("Nimbus".equals(info.getName())) 
                             {
                                       UIManager.setLookAndFeel(info.getClassName());
     
                                       break;
                             }
                         }*/
     
     
     
     
                core c = new core();
     
                c.setTitle("Puma");
                c.setSize(screenSize);
                c.setExtendedState(JFrame.MAXIMIZED_BOTH);
                c.addWindowListener(new WindowAdapter() {@Override
                        public void windowClosing(WindowEvent e) {System.exit(0);}});
                c.setUndecorated(true);
                c.init();
                c.show();
            }
     
            catch(Exception e)
            {
                e.printStackTrace();
            }
        }
    }

  4. #4
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    Default Re: Music player problem

    Hi, There is one more error appearing saying that

    TaskPanel can not be resolved.

  5. #5
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    Default Re: Music player problem

    sorry forgot to ive you the TaskPanel class code
    import java.io.*;
    import javax.swing.*;
    import java.awt.*;
    import java.io.*;
    import java.io.FileInputStream.*;
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import javax.swing.JInternalFrame;
    import javax.swing.UIManager.*;
    import javax.swing.event.ChangeEvent;
    import javax.swing.event.ChangeListener;
    import javax.swing.event.InternalFrameEvent;
    import javax.swing.event.InternalFrameListener;
    import javax.swing.event.ListSelectionEvent;
    import javax.swing.event.ListSelectionListener;
    import javax.swing.table.DefaultTableModel;
    import javax.media.*;
    import com.sun.media.ui.*;
    import javax.media.protocol.*;
    import javax.media.protocol.DataSource;
    import java.util.Vector;
    import java.net.*;
    import javax.swing.event.InternalFrameAdapter;
     
     
    public class TaskPanel extends JToolBar implements ActionListener
    {   
        JButton m;
        public void content() throws UnsupportedLookAndFeelException, ClassNotFoundException, InstantiationException, IllegalAccessException
        {
            UIManager.setLookAndFeel("com.seaglasslookandfeel.SeaGlassLookAndFeel");
            m = new JButton("Musique");
          //m.setSize(10, 10);
          m.addActionListener(this);
            add(m);
     
     
        }
        public void actionPerformed(ActionEvent event)
            {try{
     
            if(event.getSource() == m)
            {
            Musique n = new Musique();
            n.init();
     
            core c = new core();
     
            }
        }
             catch(Exception e)
             {
                e.printStackTrace();
             }
        }
    }

  6. #6
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    Default Re: Music player problem

    Hi Now I am getting one more error on this particular line

    UIManager.setLookAndFeel("com.seaglasslookandfeel. SeaGlassLookAndFeel");

    The error is:
    java.lang.ClassNotFoundException: com.seaglasslookandfeel.SeaGlassLookAndFeel

  7. #7
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    Default Re: Music player problem

     UIManager.setLookAndFeel("com.seaglasslookandfeel.SeaGlassLookAndFeel");
                /*for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels())
                         {
                             if ("Nimbus".equals(info.getName())) 
                             {
                                       UIManager.setLookAndFeel(info.getClassName());
     
                                       break;
                             }
                         }*/

    If you can see this part of the program just chage it to

    // UIManager.setLookAndFeel("com.seaglasslookandfeel.SeaGlassLookAndFeel");
                for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels())
                         {
                             if ("Nimbus".equals(info.getName())) 
                             {
                                       UIManager.setLookAndFeel(info.getClassName());
     
                                       break;
                             }
                         }

    It will work
    Sorry for troubling you so much

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