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Posted 13 Aug 2006
Licenced CPOL

LZW Compression Algorithm Implemented in Java

, 13 Aug 2006
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This article provides an implementation of the LZW compression algorithm in Java


I recently had the opportunity to look into compression for a project. I had to implement the Lempel-Ziv-Welch (LZW) algorithm for mobile phones in J2ME but before that, I implemented it in Java for testing purposes.

I wish to thank Mark Nelson for pointing out that the Unisys patent on this algorithm has expired, so there are fewer headaches in the use of this algorithm.


This implementation is actually based on the C version of the implementation by Mark Nelson at Please refer to this website for further details about the algorithm. The Java adaptation is designed to work for ASCII encoded text files.


  • 13th August, 2006: Initial post


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Comments and Discussions

Questionlzw decompression algorithm Pin
Member 1146051317-Feb-15 22:25
memberMember 1146051317-Feb-15 22:25 
QuestionNice topic Pin
sanya.fesak21-Sep-11 20:01
membersanya.fesak21-Sep-11 20:01 
Generallzw in matlab Pin
hana.rahmati30-Apr-10 23:14
memberhana.rahmati30-Apr-10 23:14 
Questionalgorithm for n-queen Pin
hana.rahmati30-Apr-10 22:38
memberhana.rahmati30-Apr-10 22:38 
GeneralI download your souce code and I have J creator and net beams install how do I run this file to test it Pin
Bulitpruf7-Aug-09 8:53
memberBulitpruf7-Aug-09 8:53 
GeneralRe: I download your souce code and I have J creator and net beams install how do I run this file to test it Pin
mitesh355519-Jan-10 18:15
membermitesh355519-Jan-10 18:15 
Generalhelp me to implementing the "dynamic markov compression of C version" to Java (JSDK) and J2me version.. :( Pin
bytescode28-Apr-09 2:39
memberbytescode28-Apr-09 2:39 
QuestionCan you also provide the decompression method Pin
pakhtoon18-Nov-07 13:43
memberpakhtoon18-Nov-07 13:43 
AnswerRe: Can you also provide the decompression method Pin
manishaswati30-Aug-08 4:26
membermanishaswati30-Aug-08 4:26 
AnswerRe: Can you also provide the decompression method Pin
duraigowardhan1-Oct-09 6:05
memberduraigowardhan1-Oct-09 6:05 
QuestionRe: Can you also provide the decompression method Pin
skumarmails17-Jan-10 23:47
memberskumarmails17-Jan-10 23:47 
AnswerRe: Can you also provide the decompression method Pin
guyver.nihilith14-Feb-10 6:24
memberguyver.nihilith14-Feb-10 6:24 
QuestionTABLE_SIZE Pin
GordonMorgan4-May-07 6:55
memberGordonMorgan4-May-07 6:55 
Generalurgent Pin
simarjeet26-Apr-07 6:47
membersimarjeet26-Apr-07 6:47 
GeneralRe: urgent Pin
Kusmadi Cakep8-Jan-10 21:35
memberKusmadi Cakep8-Jan-10 21:35 
GeneralJ2ME for LZW Pin
fur12820-Mar-07 5:32
memberfur12820-Mar-07 5:32 
GeneralRe: J2ME for LZW Pin
ed welch3-Jun-07 8:47
membered welch3-Jun-07 8:47 
GeneralLZW in VC++ Pin
mannur28-Feb-07 5:27
membermannur28-Feb-07 5:27 
Generalrequest Pin
rancidbondut19-Feb-07 9:03
memberrancidbondut19-Feb-07 9:03 
GeneralRe: LZW for J2ME Pin
fahadkhowaja16-Feb-07 3:09
memberfahadkhowaja16-Feb-07 3:09 
Generallzw for j2me Pin
scntuan10-Sep-06 8:26
memberscntuan10-Sep-06 8:26 
Hi Do you have a j2me version of lzw ? Your current version just works well on j2se.
GeneralCongratulations and to follow !!! Pin
Pipa_Soft15-Aug-06 6:41
memberPipa_Soft15-Aug-06 6:41 
GeneralRe: Congratulations and to follow !!! Pin
pakhtoon18-Nov-07 13:47
memberpakhtoon18-Nov-07 13:47 
GeneralRe: Congratulations and to follow !!! Pin
skumarmails17-Jan-10 23:34
memberskumarmails17-Jan-10 23:34 
Generallzw copyright Pin
snorkelman13-Aug-06 8:33
membersnorkelman13-Aug-06 8:33 

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