Eclipse run my program well however JAR-file does not

Question

I have four classes in my game; Player.java, Game.java, Island.java and Map.java. And basically its plenty of code to link here however my issue is that my program works fine in eclipse but when i export as jar and run it nothing is opened so i open it with CMD and it gives errors.

Input in CMD:

java -jar GameAlliansen.jar

Output from CMD:

Exception in thread "main" java.lang.NullPointerException at javax.swing.ImageIcon.

This is how i import my images

 island = new ImageIcon(Game.class.getResource("/Island(64x64).png"));

https://i.stack.imgur.com/8T2Nv.png Thats my image of project

1. Is the file included in the jar? 2. Does it have the correct capitalization? — kiheru, May 21 '15 at 12:58
@Lurr123 see [here](http://stackoverflow.com/questions/8532114/how-to-package-images-into-a-runnable-jar) and [here](http://stackoverflow.com/questions/1096398/add-image-to-jar-java) — timato, May 21 '15 at 13:02
has *Island(64x64).png* been exported in the jar file? if what is its location in the jar file? — Blip, May 21 '15 at 13:03
More examples [here](http://stackoverflow.com/tags/embedded-resource/info). — Catalina Island, May 21 '15 at 13:04
I just do the export with runnable and just simple jar however noone works. — Ludvig W, May 21 '15 at 14:02
Also they seem kind of small, just 59KB? That cant be right? — Ludvig W, May 21 '15 at 14:03

score 2 · Accepted Answer · answered May 21 '15 at 12:57

2

Change the code to:

Icon island =new ImageIcon(ImageIO.read(getClass().getResource("/Island(64x64).png")));

answered May 21 '15 at 12:57

Akash Rajbanshi

1,553
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Changed, same problem works in eclipse but not when i run outside eclipse as the runnable jar – Ludvig W May 21 '15 at 13:57

score 1 · Answer 2 · answered May 21 '15 at 14:39

The paths inside jars are case sensitive, whereas not all filesystems are (such as the one used by Windows is just case preserving, not case sensitive). You're trying to load "Island(64x64).png", but the image shows the actual filename is "island(64x64).png". Change these to match.

score 0 · Answer 3 · answered May 21 '15 at 12:58

0

When you export it, create a folder in which you will put your jar file and ALSO the image Island(64x64).png

answered May 21 '15 at 12:58

Normal design

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Well, i wanted to not need to do that, i mean simply include images in the JAR to be able to upload it so people can download just one single file – Ludvig W May 21 '15 at 13:49

Eclipse run my program well however JAR-file does not

3 Answers3