Module java.base

Package java.util.jar

Provides classes for reading and writing the JAR (Java ARchive) file format, which is based on the standard ZIP file format with an optional manifest file. The manifest stores meta-information about the JAR file contents and is also used for signing JAR files.

Package Specification

The java.util.jar package is based on the following specifications:

• Info-ZIP file format - The JAR format is based on the Info-ZIP file format. See java.util.zip package description.

  In JAR files, all file names must be encoded in the UTF-8 encoding.

• Manifest and Signature Specification - The manifest format specification.

Since:

1.2

Interface Summary

Interface	Description
Pack200.Packer	Deprecated, for removal: This API element is subject to removal in a future version. This interface is deprecated, and is planned for removal in a future release.
Pack200.Unpacker	Deprecated, for removal: This API element is subject to removal in a future version. This interface is deprecated, and is planned for removal in a future release.

Class Summary

Class	Description
Attributes	The Attributes class maps Manifest attribute names to associated string values.
Attributes.Name	The Attributes.Name class represents an attribute name stored in this Map.
JarEntry	This class is used to represent a JAR file entry.
JarFile	The JarFile class is used to read the contents of a jar file from any file that can be opened with java.io.RandomAccessFile.
JarInputStream	The JarInputStream class is used to read the contents of a JAR file from any input stream.
JarOutputStream	The JarOutputStream class is used to write the contents of a JAR file to any output stream.
Manifest	The Manifest class is used to maintain Manifest entry names and their associated Attributes.
Pack200	Deprecated, for removal: This API element is subject to removal in a future version. This class is deprecated, and is planned for removal in a future release.

Exception Summary

Exception	Description
JarException	Signals that an error of some sort has occurred while reading from or writing to a JAR file.