PKZIP : Java Glossary

The CurrCon Java Applet displays prices on this web page converted with today’s exchange rates into your local international currency, e.g. Euros, US dollars, Canadian dollars, British Pounds, Indian Rupees… CurrCon requires an up-to-date browser and Java version 1.6 or later, preferably 1.7.0_17. If you can’t see the prices in your local currency, Troubleshoot

PKZIP

PkWare version 14 Last revised/verified: 2012-05-23 creates various compression utilities including PKZIP for Windows ( $30.00 USD ) and Unix, including various types of encryption as well. You can buy a DCL (Data Control Language) library to do compression in your own programs. The catch is, it only handles compression of an array of bytes, basically a GZIP class. It cannot deal with the complex PKZIP archive format. The documentation on how to use PKZIPc.exe, the command line version, is in a file called Program Files\PKWARE\PKZIPC\PKZIPc.pdf. PKZIP.exe is the old DOS-command line compatible version. The gui interface program is called PKZIPw.exe.

PKZIP can decompress zip, jar, tar, gz, and tar.gz files.

PKZIP offer a free reader that can decompress any format of zip file, but not compress them. This allows you to unzip even files compressed with PKWare proprietary formats.

DownloadFree PKZIP Reader

History

Pkware’s founder, Phil Katz wrote PkArc for DOS (Disk Operating System) to compress files. It used the same format as SEA Arc. In the legal battle that ensured, Katz was blocked from using the arc format, a major blow to computer industry as a whole because the ruling broadly interpreted copyright to effectively include algorithms and file formats. Katz’s code was in assembler and was much faster than the high level SEA code. The issue was muddied because Katz had seen SEA’s code. Katz then created the Zip file format and made it public domain so competitors could use it to. It has become the defacto compression standard. It is also used in Java jar and war files. Katz died in 2000.

7-Zip
archive
bzip2
compression
compression utilities
distributing Java source
GZIP
JAR
jar.exe
Pack200.exe
WinRAR
WinZip
zip
Zip64 file layout

	available on the web at:	http://mindprod.com/jgloss/pkzip.html
	optional Replicator mirror of mindprod.com on local hard disk J:	J:\mindprod\jgloss\pkzip.html
	Please email your feedback for publication, letters to the editor, errors, omissions, typos, formatting errors, ambiguities, unclear wording, broken/redirected link reports, suggestions to improve this page or comments to Roedy Green : . If you want your message, your name or email kept confidential, not considered for public posting, please explicitly specify that. Unless you state otherwise, I will treat your message as a letter to the editor that I may or may not publish in the feedback section. After that, it will be too late to retract it. If you disagree with something I said, especially when sending an ad-hominem attack, a rant composed mainly of obscenities or a death threat, please quote the offending passage and cite the web page where you found it, tell me why you think it is wrong, and, if possible, provide some supporting evidence. I can’t very well fix erroneous or ambiguous text if I can’t find it.
Blog	Canadian Mind Products IP:[65.110.21.43] Your face IP:[184.72.184.104]
Feedback	You are visitor number 18,861.