OpenJDK 27 · java.util.zip · APIdia, the JavaDoc alternative

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, CRC-32C 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.
An implementation may optionally support the ZIP64(tm) format extensions defined by the PKWARE ZIP File Format Specification. The ZIP64(tm) format extensions are used to overcome the size limitations of the original ZIP format.
APPENDIX D of PKWARE ZIP File Format Specification - Language Encoding Flag to encode ZIP entry filename and comment fields using UTF-8.
ZLIB Compressed Data Format Specification version 3.3 (pdf) (RFC 1950)
DEFLATE Compressed Data Format Specification version 1.3 (pdf) (RFC 1951)
GZIP file format specification version 4.3 (pdf) (RFC 1952)
CRC-32 checksum is described in RFC 1952 (above)
CRC-32C checksum is described in Internet Small Computer Systems Interface (iSCSI) (pdf) (RFC 3720)
Adler-32 checksum is described in RFC 1950 (above)

Modifier and Type	Interface and Description
public interface	Checksum An interface representing a data checksum.
pack-priv interface	ZipConstants

Class Summary

Modifier and Type	Class and Description
public class	Adler32 A class that can be used to compute the Adler-32 checksum of a data stream.
public class	CheckedInputStream An input stream that also maintains a checksum of the data being read.
public class	CheckedOutputStream An output stream that also maintains a checksum of the data being written.
public class	CRC32 A class that can be used to compute the CRC-32 of a data stream.
public class	CRC32C A class that can be used to compute the CRC-32C of a data stream.
public class	DataFormatException Signals that a data format error has occurred.
public class	Deflater This class provides support for general purpose compression using the popular ZLIB compression library.
public class	DeflaterInputStream Implements an input stream filter for compressing data in the "deflate" compression format.
public class	DeflaterOutputStream This class implements an output stream filter for compressing data in the "deflate" compression format.
public class	GZIPInputStream This class implements a stream filter for decompressing GZIP file format data.
public class	GZIPOutputStream This class implements a stream filter for writing compressed data in the GZIP file format.
public class	Inflater This class provides support for general purpose decompression using the popular ZLIB compression library.
public class	InflaterInputStream This class implements a stream filter for uncompressing data in the "deflate" compression format.
public class	InflaterOutputStream Implements an output stream filter for decompressing data stored in the "deflate" compression format.
pack-priv class	ZipCoder Utility class for ZIP file entry name and comment decoding and encoding.
pack-priv class	ZipConstants64
public class	ZipEntry This class is used to represent a ZIP file entry.
public class	ZipError Deprecated for removal since 24. ZipError is no longer used and is obsolete. `ZipException` should be used instead. Signals that an unrecoverable error has occurred.
public class	ZipException Signals that a ZIP exception of some sort has occurred.
public class	ZipFile This class is used to read entries from a ZIP file.
public class	ZipInputStream An input stream for reading compressed and uncompressed ZIP file entries from a stream of bytes in the ZIP file format.
public class	ZipOutputStream This class implements an output stream filter for writing files in the ZIP file format.
pack-priv class	ZipUtils

Package java.util.zip

Package Specification

Interface Summary

Class Summary