Diff tool that can compare sub-sections of files

Question

I\'m looking for a diff tool that will allow me to compare just a sub-section of a file with a section of another file, or even of itself. Preferably eclipse based but will

Answer 1

CheckStyle is nicely integrated with Eclipse and will do the job. It will notify to you and error/warning if your code is duplicated, how much times... etc...

http://eclipse-cs.sourceforge.net/

Kdiff3 would be the other choice. Not Eclipse integrated, but a very nice free, cross-platform tool for merging, comparing files etc.