java-diff-utils

The java-diff-utils library is for computing diffs, applying patches, generation side-by-side view in Java.

It 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.

Original code and docs were forked from: java-diff-utils

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

Algorithms

This library implements Myer's diff algorithm. But it can easily replaced by any other which is better for handing your texts.

Tutorial

• In Spanish: Comparar Ficheros java-diff-utils

Changelog

2.1.1

• Bugfix: Fix issue showing inline diffs.
• Added some unit tests.

2.1.0

• Removes the dependency on Guavatime

2.0.0

• Change groupId and artifactId to prevent conflict with origin library: now 'com.github.java-diff-utils:java-diff-utils' instead of 'jp.skypencil.java-diff-utils:diffutils'
• Adds the ability to differentiate the inserted and deleted tags and class-names in inline-diff
• Default class-name is now null for deleted and inserted data, and "change" for change data
• Default tag for deleted data is del
• Default tag for inserted data is ins
• can now customize diff algorithm in DiffRowGenerator.Builder
• fix "equal" lines when lines isn't really equals (when Equalizer return equals on different strings)
• fix imbrication tag bug in lineDiff (when inline is on a multi-line chunk)
• Adds tha ability to skip data

1.5.0

• make Equalizer configurable. (pull #1)

1.4.1

• bugfix: parse method should be public

1.4.0

• switch from JDK5 to JDK7
• add Guava to dependency
• let user uses other string to represent line which does not exist
• implement event based parser like SAX (in difflib.event package)