Module java.base

Package java.util.jar

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:
  • Related Packages
    Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
  • Class Summary
    The Attributes class maps Manifest attribute names to associated string values.
    The Attributes.Name class represents an attribute name stored in this Map.
    This class is used to represent a JAR file entry.
    The JarFile class is used to read the contents of a jar file from any file that can be opened with
    The JarInputStream class is used to read the contents of a JAR file from any input stream.
    The JarOutputStream class is used to write the contents of a JAR file to any output stream.
    The Manifest class is used to maintain Manifest entry names and their associated Attributes.
  • Exception Summary
    Signals that an error of some sort has occurred while reading from or writing to a JAR file.