Image not found when running as Jar

Question

I want to ask about a problem in my project: I have a class that extends JFrame , and I want to change the Java icon on that frame to another icon using this code:

setIconImage(new ImageIcon(getClass().getResource("icon.PNG")).getImage());

I'm using NetBeans , and when I run my project from NetBeans, it runs normally, but when I run it from the jar, it does not run. Then, when I remove that code, my jar runs normally with the Java icon in the frame.

Can anyone can tell me what might be wrong with that code?

Answer 1

When running jar file you cannot access files by using:

getClass().getResource("...")

You should use:

getClass().getResourceAsStream("...")

See: File loading by getClass().getResource()