Jar files, imageIcon and image

I am building a little POP3 client and I am making the GUI with Swing.
I have a problem:
i would like to put all my classes into a jar file but so i can't load images like the imageIcon and the image for my buttons.
I have a directory with my class files and a subdirectory with the images. All classes are a part of a my own package. And so I have:
$\>RootDirectory\ [here is all class file and subdirectories]
$\>Rootdirectory\img [here is all images i need]
to make the jar file i use jar cvf myapp.jar RootDirectory
but when i lounch the application i can't see images.
I really hope thet anybody can help me!
sorry my bad english

Use the getResource(String string ) of Class: For example
ImageIcon myIcon = new javax.swing.ImageIcon(getClass().getResource("/images/VerticalRuler.gif"))
The images dir in the above example is a subdir of app's working directory. See Class API for details
Hope that helps
DB

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https://scn.sap.com/people/bertram.ganz/blog/2008/11/24/how-to-use-external-jar-files-in-web-dynpro-development-components

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If8ALP

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My application folder's contents.....................................................................................
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Hi,
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Any suggestions?

It works fine that way (...getClass().getResource....) until I create the jar file, and then I get a null pointer exception when it tries to load the image.
When I use
javax.swing.ImageIcon icon = new javax.swing.ImageIcon(("/images/imageName.jpg"));
the application works but without the images.......

Read images from external jar file (Sun's Java L&F Graphics repository)

Hi!
I don't know how to read images from an external jar file. Sun has a Java Look and Feel graphics repository that contains a lot of good images that can be used on buttons and so on. This repository is delivered as a jar file, containing only images, and I want to read the image files from that jar file directly without including them inside my application jar file. The application and image jar files will be in the same directory.
I have absolutely no clue how to solve this. Is it necessary to include the images inside my application jar file or is it possible to have them separate as I want.
Would really appreciate some help!
Best regards
Lars

Hi,
There is two ways :
1) Add your jarfile to the classpath.
Use the class loader :
URL url = ClassLoader.getSystemResource("your/package/image.gif");
Image im = (new ImageIcon(url)).getImage();
or
Image im = Toolkit.getDefaultToolkit().getImage(url);2)If you don't want to add the jar to the classpath you can use this (under jdk 1.4):
import java.util.*;
import java.util.jar.*;
import java.awt.*;
import java.io.*;
import java.awt.image.*;
import javax.imageio.*;
public class ImageUtilities {
     public static Image getImage(String jarFileName, String fileName) {
          BufferedImage image = null;
          try {
               JarFile jar = new JarFile(new File(jarFileName), false, JarFile.OPEN_READ);
               JarEntry entry = jar.getJarEntry(fileName);
               BufferedInputStream stream = new BufferedInputStream(jar.getInputStream(entry));
               image = ImageIO.read(stream) ;
          catch (Exception ex) {
               System.out.println(ex);
          return(image);
}I hope this helps,
Denis

Images are not coming out when application running through jar file.

I have written an application program using j2sdk1.4.1 that needs your help.
My application folder's contents.....................
 C:\Examination\Examination.class <-----This is the main class and application's entry point.
 C:\Examination\ExamBox.class
 C:\Examination\PaperSetterBox.class
 C:\Examination\pspBox.class
 C:\Examination\epBox.class
 C:\Examination\TimerBox.class
 C:\Examination\ReportCardBox.class
 C:\Examination\HelpBox.class
 C:\Examination\AboutBox.class
 C:\Examination\Images\(some jpg & gif files)
 C:\Examination\Sounds\(some au files)
Compilation Report: There was no error.
Execution Report : Was working properly using the command:- java Examination
Now, I created a jar file for my application in the following steps.................................
 STEP-1: Firstly, I created a text file(mainclassInfo.txt) that contains
 the line:-- Main-Class: Examination
 This line would be automatically added to the default manifest file when I would include the name of that text file with the command to create the jar file.
 Location of the text file I created: C:\mainClassInfo.txt
 STEP-2: Then I went to C:\Examination and executed the following command(by using 'Command prompt'):--------------------------------------------------------------------
jar cmf C:\mainClassInfo.txt Examination.jar Examination.class ExamBox.class PaperSetterBox.class pspBox.class epBox.class TimerBox.class ReportCardBox.class HelpBox.class AboutBox.class Images Sounds
Finally, I got the jar file:- Examination.jar
Double clicking on it application ran as it was expected.
Then, I thought, that as all the files & folders the application needed to run properly were packaged in the jar file; I should delete all the contents of the folder 'Examination', so that no one could see or use anything of the resources easily. I did that.
So, then it became only:-- C:\Examination\Examination.jar
Thereafter, I tried to run the application again and there a problem occurred! The application was running, but the images, those were to be used and shown by the application were missing somehow!!
Moreover, when I kept a copy of those 2 folders('Images' and 'Sounds') into the C:\Examination and ran the application again all the images came out normally!
I just can't understand why it's happening so mysterious?
I don't want to leave anything of the resources in an open place; I mean, outside of the jar file. The images should be used and shown by the application.
Help me please!

double post http://forum.java.sun.com/thread.jspa?threadID=582311

Jar files, imageIcon and image

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