Provides classes for reading and writing the standard ZIP and GZIP file formats. Also includes classes for compressing and decompressing data using the DEFLATE compression algorithm, which is used by the ZIP and GZIP file formats. Additionally, there are utility classes for computing the CRC-32 and Adler-32 checksums of arbitrary input streams.

Package Specification

Info-ZIP Application Note 970311 - a detailed description of the Info-ZIP format upon which the java.util.zip classes are based.
ZLIB Compressed Data Format Specification version 3.3 (PostScript) (RFC 1950)
DEFLATE Compressed Data Format Specification version 1.3 (PostScript) (RFC 1951)
GZIP file format specification version 4.3 (PostScript) (RFC 1952)
CRC-32 checksum is described in RFC 1952 (above)
Adler-32 checksum is described in RFC 1950 (above)

@since JDK1.1