My directories are
And my code is the next
image = ImageIO.read(Thread.currentThread().getContextClassLoader().getResourceAsStream("res/combo.png"));
Before I was using
image = ImageIO.read(getClass().getClassLoader().getResourceAsStream("/res/combo.png"));
When I changed the method the leading slash didn't work, so I removed it.
I think the access is working because the sound fx are loaded first. The problem is that the images don't work.
This happens only in the webstart, but not if executing the jar. (The webstar uses the same jar).