Java Swing: Runnable JAR file does not work when including images

Question

The code below works fine in Eclipse (both image-handling possibilities). But when exporting as a Runnable JAR File, and double-clicking the .JAR, nothing happens. If I comment out the image parts of the code, the .JAR runs fine as an export and the frame builds. So it seems the getting of the image is causing the .JAR to fail.

I've got the strawberry.jpg file sitting in 'C:\Users\sean\workspace\myApps\bin\testing' Could you advise if the issue is with my code?

(Code first modified here: Java Swing: unable to load image using getResource)

package testing;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.io.IOException;
import java.io.InputStream;



public class IconTest {


public static void main(String[] arguments) throws IOException {

    JFrame frame1 = new JFrame();
    frame1.setTitle("Frame1");
    frame1.setSize(500, 500);
    frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    FlowLayout flo = new FlowLayout();
    frame1.setLayout(flo);

    //POSSIBILITY 1 TO HANDLE IMAGE
      InputStream resourceAsStream = IconTest.class.getResourceAsStream("strawberry.jpg");
    Image image = ImageIO.read(resourceAsStream);
    JLabel label1 = new JLabel(new ImageIcon(image));

    //POSSIBILITY 2 TO HANDLE IMAGE
/*    java.net.URL url= IconTest.class.getResource("strawberry.jpg");
    BufferedImage watermarkImage = ImageIO.read(url);
    JLabel label1 = new JLabel(new ImageIcon(watermarkImage));*/


    frame1.add(label1);
    frame1.setVisible(true);
}

}

if you are executing in different system extract the jar and check whether the images are included. — Shriram, Apr 02 '14 at 05:08
One possibility is you can check `if ( image != null )` before including it in `JLabel` as `ImageIcon`, and if it is null, you can create `JLabel` with some alternative text... — Not a bug, Apr 02 '14 at 05:11
Aren't resources needed by the application supposed to stored in the resources directory? This might need to be configured in Eclipse, not a user of it, but this happens all the time — MadProgrammer, Apr 02 '14 at 05:14
Yes - I managed to get it to work by creating two packages - one for resources and one for my code classes. Then I right-click > import on the resources package in Eclipse to get the image. The only thing to change in my code is ....getResourceAsStream("/resources/strawberry.jpg"); — Synapse, Apr 04 '14 at 16:54

Not a bug · Answer 1 · 2014-04-02T05:26:13.070

0

POSSIBILITY 3 TO HANDLE IMAGE :

You can check that resource that you are fetching is exist or not. It resource not found then you can create JLabel with alternative text also...

JLabel label1 ;
URL imageUrl = IconTest.class.getClassLoader().getResource("strawberry.jpg");
if ( imageUrl != null ) {
    label1 = new JLabel(new ImageIcon(imageUrl));
} else {
    label1 = new JLabel("Alternative text");
}

edited Apr 02 '14 at 05:26

answered Apr 02 '14 at 05:18

Not a bug

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ImageIO can to a URL directly, not need to load the stream, which you're not closing... – MadProgrammer Apr 02 '14 at 05:20
@Krishan - this was very helpful - thanks. I managed to get it to work by creating two packages in a new Project - one for resources and one for my code classes. Then I right-click > import on the resources package in Eclipse to get the image. The only thing to change in my code is ....getResourceAsStream("/resources/strawberry.jpg"); – Synapse Apr 04 '14 at 16:58

score 0 · Answer 2 · edited Apr 02 '14 at 05:24

0

Put the image where you have the source file because it points to the source directory

InputStream resourceAsStream = IconTest.class.getResourceAsStream("strawberry.jpg");

and then generate runnable jar file and then right click the jar and give run as java platform binary

edited Apr 02 '14 at 05:24

answered Apr 02 '14 at 05:19

Karthigeyan Vellasamy

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I could be wrong, but I don't thing eclipse likes resources in the arc directory and doesn't include the files in the src directory, I think they need to be in resources directory – MadProgrammer Apr 02 '14 at 05:22

score 0 · Answer 3 · answered Apr 02 '14 at 05:32

0

Following Maven standard directory layout might be helpful:

layout

answered Apr 02 '14 at 05:32

score 0 · Answer 4 · answered Apr 02 '14 at 06:16

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InputStream resourceAsStream = IconTest.class.getResourceAsStream("/strawberry.jpg")

It should start from "/". Also check whether the jar actually have the image. Just unpack it and check whether the image is actually added.

answered Apr 02 '14 at 06:16

StanislavL

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score 0 · Accepted Answer · answered Apr 04 '14 at 17:04

The guidance offered here in troubleshooting the problem helped greatly - thank you to everyone. I tested contents of an exported JAR; I used diagnostic code suggested by Kishan to determine if my code could "see" the image. I believe it might have something to do with the way Eclipse works/refreshes if I move images around in the file system instead of the Eclipse import function. Finally, in order to get it to work, I made the following changes: I created a new project and two sub-packages - one for 'resources' and one for my code class. Then I right-clicked > import on the resources package in Eclipse to get the image.

The only thing to change in my code is ....getResourceAsStream("/resources/strawberry.jpg");

Java Swing: Runnable JAR file does not work when including images

5 Answers5