Java diff viewer Component?

Hi folks,

I'm looking for a Swing Component that can display differences between two files/streams/char arrays side by side, preferably with colour highlighting.

Remarkably, it seems that such a thing is hard to come by, along with Java implementations of various diff algorithms.

Any ideas?

For reference purposes, I have looked at implementing the Levenshtein distance algorithm, as well as investigated ports of the GNU diff algo to Java. These are both options, of course.

However, I guess that the diff algorithm would probably be dictated by the diff viewer Component, so I'm not going too far in that direction yet.

License should preferably be GPL compatible, if at all possible.

Thanks for any suggestions.

Rogan.

P.S. The most obvious search result (JDiff) provides reports on the differences between versions of the Java API :-( Not quite what I was looking for.
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