Java simple String diff util

Question

I'm looking for a simple java lib/src to highlight differences between two Strings, case-sensitive. A html output would be great, but I would be happy to get the indexes of the diffs, something like:

diff("abcd","aacd") 
> [2,2]
diff("maniac", "brainiac")
> ["man",brain"] or [0,3] or something like that

The idea is to higlight typos or such in a swing program, since the input shold follow strict conventions.

identifying typos is a very complex problem. are you going to compare every input word with every valid word? please look up spelling suggestions etc on the web — Miserable Variable
– Miserable Variable, Commented Feb 11, 2009 at 12:21
This isn't really a duplicate, since you're asking for how to highlight the difference, but there are some good answers on this related question. — Bill the Lizard
– Bill the Lizard, Commented Feb 11, 2009 at 13:09
I'm not looking for input validation. I'm looking for string comparison. — Miguel Ping
– Miguel Ping, Commented Feb 11, 2009 at 18:49

Mikezx6r · Accepted Answer · 2009-02-11 12:11:54Z

8

Apache Commons Lang has a class called StringUtils which has both difference and indexOfDifference which fulfills your needs.

http://commons.apache.org/lang/

Check it out

answered Feb 11, 2009 at 12:11

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Mikezx6r

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Michael Myers · Accepted Answer · 2009-02-11 15:38:39Z

1

The java-diff project might also be useful.

This is an implementation of the longest common subsequences (LCS) algorithm for Java. The Diff#diff() method returns a list of Difference objects, each of which describes an addition, a deletion, or a change between the two collections.

answered Feb 11, 2009 at 15:38

Michael Myers♦

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