Java using an image inside a .jar file

Question

I know questions like this have been asked before, but I have looked and tried a lot of the answers and none of them work. I am trying to use an image inside a .jar file. The image is stored in the directory /world/maps/map1.jpg.

            BufferedImage bigImg;
            try
            {
                bigImg = ImageIO.read(getClass().getResourceAsStream("/world/maps/" + name + ".jpg"));
            }
            catch(Exception e)
            {
                System.out.println(e + ": is the error");
                bigImg = null;
            }

Thanks for the help.

forgot to make it clear but class file is in the same directory as image

this is the error -- java.lang.IllegalArgumentException: input == null! Yes i did add it to the class path, I first compiled as zip and could see the file inside — Kieran Jones, Apr 05 '13 at 17:17

score 1 · Answer 1 · answered Apr 05 '13 at 17:20

1

If you directory tree is something like:

SomeClass.class
world
|--maps
   |--image.jpg

You can use some reference like:

SomeClass.class.getResource("./world/maps/image.jpg")

If the class is inside some another directory, just add ../ to the path.

answered Apr 05 '13 at 17:20

elias

15,010
4
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I tried that and it doesn't work, On compile is says incompatible types (requires bufferedimage got url), also they are in same directory, i made it /world/maps because that was an answer on a similar thread. It didn't work when it was a .jar file – Kieran Jones Apr 05 '13 at 17:26
I don't understand. `BufferedImage bigImg = ImageIO.read(SomeClass.class.getResource("./world/maps/image.jpg"))` works correctly. – elias Apr 05 '13 at 18:44
Are you using Jdk 5 or higher to compile? Some tools like Maven can use an older version of the Jdk by default. – elias Apr 08 '13 at 17:42

score 0 · Answer 2 · answered Apr 05 '13 at 17:28

0

The class on which getClass() is called must reside in the same jar. And the path must be case sensitive. Are you sure that name is "image"?

answered Apr 05 '13 at 17:28

Joop Eggen

107,315
7
83
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yes it works when done from the command line (java start), the point is I need it to work from a .jar file – Kieran Jones Apr 05 '13 at 17:34

Java using an image inside a .jar file

2 Answers2