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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Apr 27 23:31:51 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Package java.util.zip</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-use.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../java/util/jar/package-summary.html"><B>PREV PACKAGE</B></A> <A HREF="../../../javax/accessibility/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="package-summary.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><H2>Package java.util.zip</H2>Provides classes for reading and writing the standard ZIP and GZIPfile formats.<P><B>See: </B><BR> <A HREF="#package_description"><B>Description</B></A><P><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Interface Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Checksum.html"><I>Checksum</I></A></B></TD><TD>An interface representing a data checksum.</TD></TR></TABLE> <P><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Adler32.html">Adler32</A></B></TD><TD>A class that can be used to compute the Adler-32 checksum of a data stream.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="CheckedInputStream.html">CheckedInputStream</A></B></TD><TD>An input stream that also maintains a checksum of the data being read.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="CheckedOutputStream.html">CheckedOutputStream</A></B></TD><TD>An output stream that also maintains a checksum of the data being written.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="CRC32.html">CRC32</A></B></TD><TD>A class that can be used to compute the CRC-32 of a data stream.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Deflater.html">Deflater</A></B></TD><TD>This class provides support for general purpose compression using the popular ZLIB compression library.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="DeflaterOutputStream.html">DeflaterOutputStream</A></B></TD><TD>This class implements an output stream filter for compressing data in the "deflate" compression format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="GZIPInputStream.html">GZIPInputStream</A></B></TD><TD>This class implements a stream filter for reading compressed data in the GZIP format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="GZIPOutputStream.html">GZIPOutputStream</A></B></TD><TD>This class implements a stream filter for writing compressed data in the GZIP file format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Inflater.html">Inflater</A></B></TD><TD>This class provides support for general purpose decompression using popular ZLIB compression library.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="InflaterInputStream.html">InflaterInputStream</A></B></TD><TD>This class implements a stream filter for uncompressing data in the "deflate" compression format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="ZipEntry.html">ZipEntry</A></B></TD><TD>This class is used to represent a ZIP file entry.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="ZipFile.html">ZipFile</A></B></TD><TD>This class is used to read entries from a zip file.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="ZipInputStream.html">ZipInputStream</A></B></TD><TD>This class implements an input stream filter for reading files in the ZIP file format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="ZipOutputStream.html">ZipOutputStream</A></B></TD><TD>This class implements an output stream filter for writing files in the ZIP file format.</TD></TR></TABLE> <P><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Exception Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="DataFormatException.html">DataFormatException</A></B></TD><TD>Signals that a data format error has occurred.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="ZipException.html">ZipException</A></B></TD><TD>Signals that a Zip exception of some sort has occurred.</TD></TR></TABLE> <P><A NAME="package_description"><!-- --></A><H2>Package java.util.zip Description</H2><P>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> <li><a href="http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1950.txt"> ZLIB Compressed Data Format Specification version 3.3</a> <a href="http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1950.ps"> (PostScript)</a> (RFC 1950)<p> <li><a href="http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1951.txt"> DEFLATE Compressed Data Format Specification version 1.3</a> <a href="http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1951.ps"> (PostScript)</a> (RFC 1951)<p> <li><a href="http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1952.txt"> GZIP file format specification version 4.3</a> <a href="http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1952.ps"> (PostScript)</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>--><P><DL><DT><B>Since: </B><DD>JDK1.1</DD></DL><HR><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_bottom"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-use.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. 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