Generate formatted diff output in Java

Question

Are there any libraries out there for Java that will accept two strings, and return a string with formatted output as per the *nix diff command?

e.g. feed in

<

Answer 1

java-diff-utils

The DiffUtils library for computing diffs, applying patches, generationg side-by-side view in Java

Diff Utils library is an OpenSource library for performing the comparison operations between texts: computing diffs, applying patches, generating unified diffs or parsing them, generating diff output for easy future displaying (like side-by-side view) and so on.

Main reason to build this library was the lack of easy-to-use libraries with all the usual stuff you need while working with diff files. Originally it was inspired by JRCS library and it's nice design of diff module.

Main Features

• computing the difference between two texts.
• capable to hand more than plain ascci. Arrays or List of any type that implements hashCode() and equals() correctly can be subject to differencing using this library
• patch and unpatch the text with the given patch
• parsing the unified diff format
• producing human-readable differences