compression : Java Glossary

2006-02-26 by Roedy Green ©1996-2009 Canadian Mind Products
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compression

Since data communication lines are so slow, it is important to use every possible scheme to use them efficiently. Compression schemes can reduce the amount of data that needs to be sent. The receiver fluffs the data back up to its original size. Compression schemes depend on the fact that most messages repeat words or phrases and use some letters of the alphabet more frequently than others. Compressors invent a scheme of short abbreviations for commonly used items.

Java Compression Classes	Learning More
Standalone Compression Utilities	Links

Java Compression Classes

The GZIPOutputStream/GZipInputStream compress entire files, not a file of members in Zip format. Other classes of interest include Deflater/ Inflater, DeflaterOutputStream/ InflaterInputStream, ZipEntry, ZipException, ZipFile, ZipInputStream, ZipOutputStream and Adler32 (for quick checksums);

Learning More

Sun’s Javadoc on the ZipFile class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the ZipEntry class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the ZipInputStream class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the ZipOutputStream class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the GZIPInputStream class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the GZIPOutputStream class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the Inflater class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the Deflater class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the InflaterInputStream class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the DeflaterOutputStream class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the Adler32 class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

7-Zip
archive
bzip2
compression utilities
GZIP
Huffman encoding
jar.exe
Pack200.exe
PKZIP
WinRar
WinZip
Zip

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