We've all been there - few days of googling and trying, yet perfectly written code isn't working. It compiles fine yet application crashes.
You tried every consievable solution and even went for a last resort — adding external library dependency. Yet it doesn't seem to help.
What to do with cases like these? Solution were right on the nose. Literally.

Just change background of active editor of the IDE you use, recompile your programm - and voilà. You are welcome.

This official yet undocumented solution works 100% of the times (haven't been able to try it on Java 8 though).

Ping me if I could help you with anything else, bud.