Contents of a JAR file Java applications and libraries can contain hundreds of different files, including compiled Java source code, a manifest file, XML-based configuration data, JSON-based data ...

Packaging Java programs as JAR files There's nothing particularly interesting about a JAR file. At its heart, it's simply a mechanism to compress multiple files. A JAR file uses exactly the same ...

A JAR file is an archive file but is more than a file compression format. Here's how to open, run, or execute JAR files.