I'm writing a programm in which I need to generate a diff and display the result. Is there any GUI component out there, with which I can easily accomplish this task, or do I need to hack something for myself?
I'd prefer using a Swing component, but any other technology will be fine, too.
There is a diff tool available if you are building on the NetBeans platform.
If you can't use that, I don't think it would be difficult to create a basic one that uses HTML in a JEditorPane to display the results.