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
Thejava.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 The packer engine applies various transformationsDeprecated, for removal: This API element is subject to the input JAR file, making the pack stream highly compressible byremoval in a future version. This interface is deprecated, and is planned for removal in a compressor such as gzip or zipfuture release.Pack200.Unpacker The unpacker engine converts the packed streamDeprecated, for removal: This API element is subject to removal in a future version. This interface is deprecated, and is planned for removal in a JAR filefuture 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 TheJarFileclass is used to read the contents of a jar file from any file that can be opened withjava.io.RandomAccessFile.JarInputStream TheJarInputStreamclass is used to read the contents of a JAR file from any input stream.JarOutputStream TheJarOutputStreamclass 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 Transforms a JAR fileDeprecated, for removal: This API element is subject to or fromremoval in a packed streamfuture version. This class is deprecated, and is planned for removal in Pack200 formata 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.