<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!--Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. This code is free software; you can redistribute it and/or modify itunder the terms of the GNU General Public License version 2 only, aspublished by the Free Software Foundation.  Oracle designates thisparticular file as subject to the "Classpath" exception as providedby Oracle in the LICENSE file that accompanied this code. This code is distributed in the hope that it will be useful, but WITHOUTANY WARRANTY; without even the implied warranty of MERCHANTABILITY orFITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public Licenseversion 2 for more details (a copy is included in the LICENSE file thataccompanied this code). You should have received a copy of the GNU General Public License version2 along with this work; if not, write to the Free Software Foundation,Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USAor visit www.oracle.com if you need additional information or have anyquestions.--> </head><body bgcolor="white"> Provides classes for reading and writing the standard ZIP and GZIPfile formats.  Also includes classes for compressing and decompressingdata using the DEFLATE compression algorithm, which is used by theZIP and GZIP file formats. Additionally, there are utility classesfor computing the CRC-32 and Adler-32 checksums of arbitraryinput streams.  <h2>Package Specification</h2> </a><ul>  <li><a href="ftp://ftp.uu.net/pub/archiving/zip/doc/appnote-970311-iz.zip">      Info-ZIP Application Note 970311      </a> - a detailed description of the Info-ZIP format upon which      the <code>java.util.zip</code> classes are based.<p>  <a name="zip64">  <li>An implementation may optionally support the ZIP64(tm) format extensions      defined by the       <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">      PKWARE ZIP File Format Specification</a>. The ZIP64(tm) format extensions      are used to overcome the size limitations of the original ZIP format.<p>  <a name="lang_encoding">  <li>APPENDIX D of <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">      PKWARE ZIP File Format Specification</a> - Language Encoding Flag (EFS) to      encode ZIP entry filename and comment fields using UTF-8.<p>  <li><a href="http://www.ietf.org/rfc/rfc1950.txt">      ZLIB Compressed Data Format Specification version 3.3</a>      &nbsp;      <a href="http://www.ietf.org/rfc/rfc1950.txt.pdf">(pdf)</a>      (RFC 1950)<p>  <li><a href="http://www.ietf.org/rfc/rfc1951.txt">      DEFLATE Compressed Data Format Specification version 1.3</a>      &nbsp;      <a href="http://www.ietf.org/rfc/rfc1951.txt.pdf">(pdf)</a>      (RFC 1951)<p>  <li><a href="http://www.ietf.org/rfc/rfc1952.txt">      GZIP file format specification version 4.3</a>      &nbsp;      <a href="http://www.ietf.org/rfc/rfc1952.txt.pdf">(pdf)</a>      (RFC 1952)<p>  <li>CRC-32 checksum is described in RFC 1952 (above)<p>  <li>Adler-32 checksum is described in RFC 1950 (above)</ul>  <!--<h2>Related Documentation</h2> For overviews, tutorials, examples, guides, and tool documentation, please see:<ul>  <li><a href="">##### REFER TO NON-SPEC DOCUMENTATION HERE #####</a></ul>--> @since JDK1.1</body></html>