Trouble building executable jar in IntelliJ

Question

I'm trying to export my project to a jar file in IntelliJ using these instructions , and failing.

I'm getting a NullPointerException on this line in my application:

ClassLoader.getSystemClassLoader().getResource(".").getPath(); 

Note that this same project exports fine in Eclipse.

I've tried changing the Class-Path in the manifest to . , as I've noticed this change in the jar exported by Eclipse.

Then, my application gets a bit further, but bails when trying to load any of the resource files included in my jar. This is how:

Assume my jar is placed in

/Users/me/screwed.jar

When my application tries to open resource.file in the root of the jar file, it's searching for it here:

/Users/me/resource.file

This triggers a NullPointerException .

How do I fix this, team?

Answer 1

Use this line to load your path:

this.getClass().getClassLoader().getResource(".").getPath();

This should be the root of your jar file and allow you to open resources within it.

For static context, use

MyStaticClassName.class.getClassLoader().getResource(".").getPath();

where MyStaticClassName is some staic utility class.