Eclipse exported Runnable JAR not showing images

Question

My images will not load when running a JAR file exported from Eclipse.

I have the images in a resources class package. I've tried a images source folder as well with no luck.

Works perfectly when loaded from Eclipse. The images are in the exported JAR file, so they're exporting fine.

I've tried:

label.setIcon(new ImageIcon(MainFrame.class.getResource("/resources/header.jpg")));

I've also tried:

URL url = getClass().getResource("/resources/header.jpg");
Image image = Toolkit.getDefaultToolkit().getImage(url);
label.setIcon(new ImageIcon(image));

And:

try
{
    label.setIcon(new  ImageIcon(ImageIO.read(getClass().getResource("/resources/header.jpg"))));
}
catch (IOException e1)
{
    e1.printStackTrace();
}

Any suggestions?

Answer 1

Works fine for me. Check what you may have different.

Example 1: (resources in src)

Steps:

1. File Structure

   

2. Code

   package com.stackoverflow.test;
   
   import java.net.URL;
   import javax.swing.*;  // Wild carded for brevity. 
                          // Actual code imports single classes
   public class Main {
       public static void main(String[] args) {
           SwingUtilities.invokeLater(new Runnable(){
               public void run() {
                   URL url = Main.class.getResource(
                                        "/resources/stackoverflow.png");
                   ImageIcon icon = new ImageIcon(url);
                   JFrame frame = new JFrame();
                   frame.add(new JLabel(icon));
                   frame.pack();
                   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                   frame.setLocationRelativeTo(null);
                   frame.setVisible(true);
               }
           });
       }
   }
   

3. [Right click on project] → [Export] → [Runnable Jar File] → [Set up Launch config]

   

4. Profit

   

FYI, the same setup runs in eclipse just fine also

---

Example 2: (resources not in src - but in project)

Steps:

1. File Structure (notice resources looks like a plain folder)

   

2. What we have to do now, is put the resources on the build path. What this does is put everything in the folder (excluding the folder itself) on the classpath

   • Right click on the project and go to [Build Path] → [Configure Build Path]

     

   • From the [Sources] tab in the dialog, select [Add Folder] and in the new dialog, select the [resources] folder

     

   • Now the contents of the resources folder is in the build path (notice the little package in the folder now

     

3. New code no longer uses the resources prefix for the path

   URL url = Main.class.getResource("/stackoverflow.png");
   

4. Same as Step 3 and 4 from above, and profit!

---

UPDATE

Setting up Launch Configuration

Generally, once you run the class (i.e. Right click on class and Run as Java Application), a run configuration will be set up. You will need this to set as the launching point in the manifest. But here's how to do it manually.

Steps:

1. [Right Click Project] → [Properties] → [Run/Debug Settings]

   You can see that I already have a run configruation (that is implicitly set from simply running the class). But to create a new one, select [New] → [Java Application]

2. Create a name for run configuration and browse or type an main launching class. In my case its the com.stackoverflow.test.Main class

   

3. Now when you export as shown in the above example, you select the run configuration

   

4. Run the jar like above.

---

EDIT

Result to Check for

Manifest:

Manifest-Version: 1.0
Rsrc-Class-Path: ./
Class-Path: .
Rsrc-Main-Class: com.stackoverflow.test.Main
Main-Class: org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader

Extracted jar: