Jave : Adding File to directory

cyberwit · 09-04-2008 4:07pm #1

I have a project to develop a Jukebox in java i have it playing sound fast forwarding everything and i have a directory where all my sound are stored. Part of the project is to allow a user add music or other sounds to the system

How do i do that. How do i allow a user add sounds to my system to the directory where my other sounds are stored . I have looked a JFileChooser but there is not method that allow me to save a file to my sound directory can anyone help.

lynchie · 09-04-2008 5:09pm

Call getSelectedFile() on the JFileChooser.

Then copy the file to the appropriate directory. Quick way is to Use Apache commons IO to do the file copy. Alternative is to do it yourself.

File source = chooser.getSelectedFile();

File dest = new File("c:\\my directory\\"+source.getName());
copy(source,dest);

Copy Method

** Fast & simple file copy. */
public static void copy(File source, File dest) throws IOException {
     FileChannel in = null, out = null;
     try {          
          in = new FileInputStream(source).getChannel();
          out = new FileOutputStream(dest).getChannel();
 
          long size = in.size();
          MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY, 0, size);
 
          out.write(buf);
 
     } finally {
          if (in != null)          in.close();
          if (out != null)     out.close();
     }
}

cyberwit · 09-04-2008 8:41pm

Thanks i really appreciate this

cyberwit · 09-04-2008 11:17pm

musicItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
//addMusic();
saveMusic = new JFileChooser();
saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
File source = saveMusic.getSelectedFile();
File dest = new File("audio/" + source.getName());
Save(source,dest);

}
}
);

public void Save(File source, File dest) throws IOException{
FileChannel in = null;
FileChannel out = null;

try{
in = new FileInputStream(source).getChannel();
out = new FileOutputStream(dest).getChannel();

long size = in.size();
MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY,0,size);
out.write(buf);
}
finally{
if(in!=null)
{
in.close();
}
if(out!=null)
{
out.close();
}
}

}

What is the following error i am getting for the following method call Save(source,dest);

Unhandled exception type IOException

Donald-Duck · 10-04-2008 2:23am

import java.io.IOException;
try{
What you had here
}
catch(IOException e){
blahblah
}

cyberwit · 10-04-2008 4:05pm

Is there any other java code that will allow me add a sound file to a directory as the above code is not functioning for me.

aidan_walsh · 10-04-2008 4:07pm

"Not functioning" how? Whats your code?

cyberwit · 10-04-2008 5:19pm

import javax.swing.Box;
import javax.swing.AbstractButton;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import java.awt.Container;
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JToolBar;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JScrollPane;
import java.io.*;
import java.io.IOException;
import javax.swing.event.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.nio.channels.FileChannel;
import java.nio.MappedByteBuffer;

public class MediaMenu {

private JFrame mediaFrame;
private JMenuBar menuBar;
private JMenu menuFile;
private JMenu menuHelp;
private JMenu menuInsert;
private JMenuItem musicGalleryItem,imageGalleryItem,musicItem,pictureItem,exitItem;
private JLabel musiclabel;
private ImageIcon jukebox;
private ImageIcon imageGallery;
private ImageIcon musicGallery;
private JToolBar options;
private JButton music;
private JButton images;
private BorderLayout layout;
private JFileChooser saveMusic;
private File musicFile;

public MediaMenu()
{
setFrame();
setMenu();
setToolBar();
}

public void setFrame()
{
mediaFrame = new JFrame("Media Menu");//Creating a frame
Container getContentPane = mediaFrame.getContentPane();//Setting up frames contentPane
//Layout Manager
layout = new BorderLayout(10,10);
//musicFrame.setSize(570,472);
mediaFrame.setSize(567,510);
mediaFrame.setResizable(false);
mediaFrame.setLayout(layout);//Assign Layout manager to frame
musiclabel=new JLabel();//creating label and assigning an image to it
musiclabel.setToolTipText("JukeBox");//Using the setToolTip Text of the JLabel class to and a too tip
jukebox= new ImageIcon(("pictures/jukeboxnew.jpg"));//Creating Image Icon and storing image in it
musiclabel.setIcon(jukebox);
getContentPane.add(musiclabel, BorderLayout.NORTH);//Adding label to contentPane of frame
mediaFrame.setIconImage(new ImageIcon("pictures/musicsymbol.jpg").getImage());//Puts Custom Icon on Frame Window
mediaFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mediaFrame.setVisible(true);
}

public void setMenu()throws IOException{

menuBar = new JMenuBar();//Create Menu Bar
menuFile = new JMenu("File");//Create File Menu Option
menuInsert = new JMenu("Insert");
menuHelp = new JMenu("Help");//Create Help Menu Option

musicGalleryItem = new JMenuItem("Music Gallery");
imageGalleryItem = new JMenuItem("Image Gallery");
exitItem = new JMenuItem("Exit");
musicItem = new JMenuItem("Add Music");//Create subMenu Option
pictureItem = new JMenuItem("Add Pictures");

musicGalleryItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
SoundPlayerGUI musicplayer = new SoundPlayerGUI();
}
}
);

imageGalleryItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
ImagePlayerGUI imageplayer = new ImagePlayerGUI();
}
}
);
exitItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
}
);

musicItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{

// addMusic();
saveMusic = new JFileChooser();
saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
File source = saveMusic.getSelectedFile();
File dest = new File("audio/" + source.getName());
Save(source,dest);

}
}
);

mediaFrame.setJMenuBar(menuBar);//Adding Menu Bar to Frame

menuBar.add(menuFile);//Add File Menu Option to Menu Bar
menuBar.add(menuInsert);
menuBar.add(Box.createHorizontalGlue());//Using the BoxLayout Manager to create a space between File and Help
menuBar.add(menuHelp);//Add Help Menu Option to Menu Bar
menuInsert.add(musicItem);//Add sub Menu Add Music to File Menu Option
menuInsert.add(pictureItem);
menuFile.add(musicGalleryItem);
menuFile.add(imageGalleryItem);
menuFile.add(exitItem);
}

//private class

public void setToolBar()
{
options = new JToolBar("Media Options");//create ToolBar
options.setSize(562,81);

imageGallery = new ImageIcon("pictures/image.jpg");//Create ImageIcon
musicGallery = new ImageIcon("pictures/imageIpod.jpg");

music = new JButton("Music Gallery",musicGallery); //creating button
music.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
SoundPlayerGUI musicplayer = new SoundPlayerGUI();
}
}
);

images = new JButton("Image Gallery",imageGallery);
images.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
ImagePlayerGUI imageplayer = new ImagePlayerGUI();
}
}
);

music.setVerticalTextPosition(AbstractButton.BOTTOM);
images.setVerticalTextPosition(AbstractButton.BOTTOM);//Aligning Image and Text on Button
music.setHorizontalTextPosition(AbstractButton.CENTER);
images.setHorizontalTextPosition(AbstractButton.CENTER);
options.add(music);
options.add(Box.createHorizontalGlue());
options.add(images);
mediaFrame.add(options,BorderLayout.CENTER);
}

//public void addMusic()throws IOException
//{
//saveMusic = new JFileChooser();
//saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
//saveMusic.addActionListener(new ActionListener(){
//public void actionPerformed(ActionEvent e)
// {
//saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
// File source = saveMusic.getSelectedFile();
//File dest = new File("audio/" + source.getName());
//Save(source,dest);
//}
// }
// );

//}

public void Save(File source,File dest) throws IOException{
FileChannel in = null;
FileChannel out = null;

try{
in = new FileInputStream(source).getChannel();
out = new FileOutputStream(dest).getChannel();

long size = in.size();
MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY,0,size);
out.write(buf);
}
catch(IOException e){
if(in!=null)
{
in.close();
}
if(out!=null)
{
out.close();
}
}

}
}

Error with Save(source,dest);
Error Message Unhandled exception type IOException"]

h57xiucj2z946q · 10-04-2008 5:27pm

possibly try:

public void Save(File source,File dest) {
	FileChannel in = null;
	FileChannel out = null;

	try {
	in = new FileInputStream(source).getChannel();
	out = new FileOutputStream(dest).getChannel();
	
	long size = in.size();
	MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY,0,size);
	out.write(buf);
	}
	catch(IOException e){
		e.printStackTrace();
	} finally {
		if(in!=null)
			in.close();
		if(out!=null)
			out.close();
	}
}

cyberwit · 10-04-2008 5:37pm

public void Save(File source,File dest) {
FileChannel in = null;
FileChannel out = null;

try {
in = new FileInputStream(source).getChannel();
out = new FileOutputStream(dest).getChannel();

long size = in.size();
MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY,0,size);
out.write(buf);
}
catch(IOException e){
e.printStackTrace();
}
finally {
if(in!=null){
in.close();
}
if(out!=null){
out.close();
}
}
}
}

I am now getting the exception error with whats in red
Unhandled exception type IOException

h57xiucj2z946q · 10-04-2008 5:44pm

When calling the "Save" function:

try {
	Save(source,dest);
} catch (IOException e) {
	e.printStackStrace();
}

Sorry forgot to leave in throws IOException

public void Save(File source,File dest) throws IOException {
	FileChannel in = null;
	FileChannel out = null;

	try {
	in = new FileInputStream(source).getChannel();
	out = new FileOutputStream(dest).getChannel();
	
	long size = in.size();
	MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY,0,size);
	out.write(buf);
	}
	catch(IOException e){
		e.printStackTrace();
	} finally {
		if(in!=null)
			in.close();
		if(out!=null)
			out.close();
	}
}

cyberwit · 10-04-2008 5:58pm

import javax.swing.Box;
import javax.swing.AbstractButton;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import java.awt.Container;
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JToolBar;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JScrollPane;
import java.io.*;
import java.io.IOException;
import javax.swing.event.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.nio.channels.FileChannel;
import java.nio.MappedByteBuffer;

public class MediaMenu {

private JFrame mediaFrame;
private JMenuBar menuBar;
private JMenu menuFile;
private JMenu menuHelp;
private JMenu menuInsert;
private JMenuItem musicGalleryItem,imageGalleryItem,musicItem,pictureItem,exitItem;
private JLabel musiclabel;
private ImageIcon jukebox;
private ImageIcon imageGallery;
private ImageIcon musicGallery;
private JToolBar options;
private JButton music;
private JButton images;
private BorderLayout layout;
private JFileChooser saveMusic;
private File musicFile;

public MediaMenu()
{
setFrame();
setMenu();
setToolBar();
}

public void setFrame()
{
mediaFrame = new JFrame("Media Menu");//Creating a frame
Container getContentPane = mediaFrame.getContentPane();//Setting up frames contentPane
//Layout Manager
layout = new BorderLayout(10,10);
//musicFrame.setSize(570,472);
mediaFrame.setSize(567,510);
mediaFrame.setResizable(false);
mediaFrame.setLayout(layout);//Assign Layout manager to frame
musiclabel=new JLabel();//creating label and assigning an image to it
musiclabel.setToolTipText("JukeBox");//Using the setToolTip Text of the JLabel class to and a too tip
jukebox= new ImageIcon(("pictures/jukeboxnew.jpg"));//Creating Image Icon and storing image in it
musiclabel.setIcon(jukebox);
getContentPane.add(musiclabel, BorderLayout.NORTH);//Adding label to contentPane of frame
mediaFrame.setIconImage(new ImageIcon("pictures/musicsymbol.jpg").getImage());//Puts Custom Icon on Frame Window
mediaFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mediaFrame.setVisible(true);
}

public void setMenu()throws IOException{

menuBar = new JMenuBar();//Create Menu Bar
menuFile = new JMenu("File");//Create File Menu Option
menuInsert = new JMenu("Insert");
menuHelp = new JMenu("Help");//Create Help Menu Option

musicGalleryItem = new JMenuItem("Music Gallery");
imageGalleryItem = new JMenuItem("Image Gallery");
exitItem = new JMenuItem("Exit");
musicItem = new JMenuItem("Add Music");//Create subMenu Option
pictureItem = new JMenuItem("Add Pictures");

musicGalleryItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
SoundPlayerGUI musicplayer = new SoundPlayerGUI();
}
}
);

imageGalleryItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
ImagePlayerGUI imageplayer = new ImagePlayerGUI();
}
}
);
exitItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
}
);

musicItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{

// addMusic();
saveMusic = new JFileChooser();
saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
File source = saveMusic.getSelectedFile();
File dest = new File("audio/" + source.getName());
try {
Save(source,dest);
} catch (IOException event) {
System.out.println("Help");
}

}
}
);

mediaFrame.setJMenuBar(menuBar);//Adding Menu Bar to Frame

menuBar.add(menuFile);//Add File Menu Option to Menu Bar
menuBar.add(menuInsert);
menuBar.add(Box.createHorizontalGlue());//Using the BoxLayout Manager to create a space between File and Help
menuBar.add(menuHelp);//Add Help Menu Option to Menu Bar
menuInsert.add(musicItem);//Add sub Menu Add Music to File Menu Option
menuInsert.add(pictureItem);
menuFile.add(musicGalleryItem);
menuFile.add(imageGalleryItem);
menuFile.add(exitItem);
}

//private class

public void setToolBar()
{
options = new JToolBar("Media Options");//create ToolBar
options.setSize(562,81);

imageGallery = new ImageIcon("pictures/image.jpg");//Create ImageIcon
musicGallery = new ImageIcon("pictures/imageIpod.jpg");

music = new JButton("Music Gallery",musicGallery); //creating button
music.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
SoundPlayerGUI musicplayer = new SoundPlayerGUI();
}
}
);

images = new JButton("Image Gallery",imageGallery);
images.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
ImagePlayerGUI imageplayer = new ImagePlayerGUI();
}
}
);

music.setVerticalTextPosition(AbstractButton.BOTTOM);
images.setVerticalTextPosition(AbstractButton.BOTTOM);//Aligning Image and Text on Button
music.setHorizontalTextPosition(AbstractButton.CENTER);
images.setHorizontalTextPosition(AbstractButton.CENTER);
options.add(music);
options.add(Box.createHorizontalGlue());
options.add(images);
mediaFrame.add(options,BorderLayout.CENTER);
}

//public void addMusic()throws IOException
//{
//saveMusic = new JFileChooser();
//saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
//saveMusic.addActionListener(new ActionListener(){
//public void actionPerformed(ActionEvent e)
// {
//saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
// File source = saveMusic.getSelectedFile();
//File dest = new File("audio/" + source.getName());
//Save(source,dest);
//}
// }
// );

//}

public void Save(File source,File dest) throws IOException {
FileChannel in = null;
FileChannel out = null;

try {
in = new FileInputStream(source).getChannel();
out = new FileOutputStream(dest).getChannel();

long size = in.size();
MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY,0,size);
out.write(buf);
}
catch(IOException e){
e.printStackTrace();
} finally {
if(in!=null)
in.close();
if(out!=null)
out.close();
}
}
}
Please look at attachment

Donald-Duck · 11-04-2008 12:20am

Damo told you what to do

Evil Phil · 11-04-2008 9:05am

Using the [noparse]

[/noparse] tags will make you posts a lot more readable too.

cyberwit · 11-04-2008 3:11pm


import javax.swing.Box;
import javax.swing.AbstractButton;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import java.awt.Container;
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JToolBar;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JScrollPane;
import java.io.*;
import java.io.IOException;
import javax.swing.event.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.nio.channels.FileChannel;
import java.nio.MappedByteBuffer;

public class MediaMenu {
	
	private JFrame mediaFrame;
    private JMenuBar menuBar;
    private JMenu menuFile;
    private JMenu menuHelp;
    private JMenu menuInsert;
    private JMenuItem musicGalleryItem,imageGalleryItem,musicItem,pictureItem,exitItem;
    private JLabel musiclabel;
    private ImageIcon jukebox;
    private ImageIcon imageGallery;
    private ImageIcon musicGallery;
    private JToolBar options;
    private JButton music;
    private JButton images;
    private BorderLayout layout;
    private JFileChooser saveMusic;
    private File musicFile;
   
    
public MediaMenu()
{
	setFrame();
	setMenu();
	setToolBar();  
}

public void setFrame()
{
	mediaFrame = new JFrame("Media Menu");//Creating a frame
	Container getContentPane = mediaFrame.getContentPane();//Setting up frames contentPane
	//Layout Manager
	layout = new BorderLayout(10,10);
	//musicFrame.setSize(570,472);
	mediaFrame.setSize(567,510);
	mediaFrame.setResizable(false);
	mediaFrame.setLayout(layout);//Assign Layout manager to frame
	musiclabel=new JLabel();//creating label and assigning an image to it
	musiclabel.setToolTipText("JukeBox");//Using the setToolTip Text of the JLabel class to and a too tip
	jukebox= new ImageIcon(("pictures/jukeboxnew.jpg"));//Creating Image Icon and storing image in it
    musiclabel.setIcon(jukebox);
	getContentPane.add(musiclabel, BorderLayout.NORTH);//Adding label to contentPane of frame
	mediaFrame.setIconImage(new ImageIcon("pictures/musicsymbol.jpg").getImage());//Puts Custom Icon on Frame Window
	mediaFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	mediaFrame.setVisible(true);
}

public void setMenu()
{
	menuBar = new JMenuBar();//Create Menu Bar
	menuFile = new JMenu("File");//Create File Menu Option
	menuInsert = new JMenu("Insert");
	menuHelp = new JMenu("Help");//Create Help Menu Option
	musicGalleryItem = new JMenuItem("Music Gallery");
	imageGalleryItem = new JMenuItem("Image Gallery");
	exitItem = new JMenuItem("Exit");
	musicItem = new JMenuItem("Add Music");//Create subMenu Option 
	pictureItem = new JMenuItem("Add Pictures");
	
	musicGalleryItem.addActionListener(new ActionListener() {
	        public void actionPerformed(ActionEvent e)
	            { 
	        	SoundPlayerGUI musicplayer = new SoundPlayerGUI();} });
	
	imageGalleryItem.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e)
			  { 
		      ImagePlayerGUI imageplayer = new ImagePlayerGUI();}});
	
	exitItem.addActionListener(new ActionListener(){
		    public void actionPerformed(ActionEvent e){System.exit(0);}});
	
	musicItem.addActionListener(new ActionListener(){ 
		public void actionPerformed(ActionEvent e){ // addMusic();
				saveMusic = new JFileChooser();
				saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
				File source = saveMusic.getSelectedFile();
				File dest = new File("/simplesound/audio/"+source.getName());
					try {
						Save(source,dest);
						} catch (IOException event) {
	    			event.printStackTrace();
						}
	    	  	    } });

	mediaFrame.setJMenuBar(menuBar);//Adding Menu Bar to Frame
	menuBar.add(menuFile);//Add File Menu Option to Menu Bar
	menuBar.add(menuInsert);
	menuBar.add(Box.createHorizontalGlue());//Using the BoxLayout Manager to create a space between File and Help
	menuBar.add(menuHelp);//Add Help Menu Option to Menu Bar
    menuInsert.add(musicItem);//Add sub Menu Add Music to File Menu Option
    menuInsert.add(pictureItem);
    menuFile.add(musicGalleryItem);
    menuFile.add(imageGalleryItem);
    menuFile.add(exitItem);
}//end of setFrame();


//private class

public void setToolBar()
{
	options = new JToolBar("Media Options");//create ToolBar
	options.setSize(562,81);
	
	imageGallery = new ImageIcon("pictures/image.jpg");//Create ImageIcon
    musicGallery = new ImageIcon("pictures/imageIpod.jpg");
    
    music = new JButton("Music Gallery",musicGallery); //creating button
    music.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e)
            { 
        	SoundPlayerGUI musicplayer = new SoundPlayerGUI();
            }
           }
          );

    images = new JButton("Image Gallery",imageGallery);
    images.addActionListener(new ActionListener(){
       public void actionPerformed(ActionEvent e)
          { 
	      ImagePlayerGUI imageplayer = new ImagePlayerGUI();
	      }
         }
        );
    
    music.setVerticalTextPosition(AbstractButton.BOTTOM);
    images.setVerticalTextPosition(AbstractButton.BOTTOM);//Aligning Image and Text on Button
    music.setHorizontalTextPosition(AbstractButton.CENTER);
    images.setHorizontalTextPosition(AbstractButton.CENTER);
    options.add(music);
    options.add(Box.createHorizontalGlue());
    options.add(images);
    mediaFrame.add(options,BorderLayout.CENTER);
}

//public void addMusic()throws IOException
//{
	//saveMusic = new JFileChooser();
	//saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
	//saveMusic.addActionListener(new ActionListener(){
	      //public void actionPerformed(ActionEvent e)
	        // { 
	    	   //saveMusic.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
	    	  // File source = saveMusic.getSelectedFile();
	    		//File dest = new File("audio/" + source.getName());
	    		//Save(source,dest);
		     //}
	       // }
	      // );
	
	
//}

public void Save(File source,File dest) throws IOException {
	FileChannel in = null;
	FileChannel out = null;

	try {
	in = new FileInputStream(source).getChannel();
	out = new FileOutputStream(dest).getChannel();
	
	long size = in.size();
	MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY,0,size);
	out.write(buf);
	}
	catch(IOException e){
		e.printStackTrace();
	} finally {
		if(in!=null)
			in.close();
		if(out!=null)
			out.close();
	}
}
}

The program runs but when i click on the Add Music in the Menu to add a sound file all i get is the following:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at MediaMenu$4.actionPerformed(MediaMenu.java:103)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Evil Phil · 11-04-2008 3:44pm

You should learn how to read a stack trace. It's line 103

Save(source,dest);

Either source and/or dest is null.

lynchie · 11-04-2008 5:25pm

You should also read up on what Exceptions are, how to declare them, catch them, throw them as below it is plainly obvious that you weren't catching or throwing the IOException.

Error with Save(source,dest);
Error Message Unhandled exception type IOException"]

Donald-Duck · 11-04-2008 5:43pm

Evil Phil wrote: »
You should learn how to read a stack trace. It's line 103
Save(source,dest);
Either source and/or dest is null.

Hes using eclipse, click on the error and it brings you to the line

cyberwit · 12-04-2008 11:23pm

I am trying to export the project as a JAR i have gone through the process in eclipse except all that is showing is only two of my windows with nothing on them and my music gallery is not showing at all can anyone help

Jave : Adding File to directory

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