Java Archive (JAR) Files

JAR (Java Archive) is a platform-independent file format that aggregates many files into one. Multiple Java applets and their requisite components (.class files, images and sounds) can be bundled in a JAR file and subsequently downloaded to a browser in a single HTTP transaction, greatly improving the download speed. The JAR format also supports compression, which reduces the file size, further improving the download time. In addition, the applet author can digitally sign individual entries in a JAR file to authenticate their origin. It is fully extensible.


Overview and Specification



API Specification



Tutorials and Programmer’s Guides



Enhancements



  • Enhancements in JDKTM 6 – An annotated list of changes between the 5.0 and 6.0 releases to APIs, the jar command, and the jar/zip implementation.

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