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.

Java Archive apps Each installation of the Java Development Kit (JDK) includes a JAR utility (named jar.sh on Unix and jar.exe on Windows) that provides a variety of helpful functions for working with ...

The following command enables you to run any Java JAR file on the command line: java -jar jarfilename.jar To use the JAR file opener that comes when you install Java with the JDK, just issue the ...

JEP 238: Multi-Release JAR Files extends the JAR file format to allow multiple, Java-release-specific versions of class/resource files to coexist in the same archive. This upgrade makes it easier ...

A JAR file is nothing more than a "standard" .ZIP file. Use a zip-based program, put all your class files and resources inside a .ZIP file. when done, rename it to .JAR.

Newer versions of Java now require all JAR files to be signed with a valid code-signing key, and starting with Java 7 Update 51, unsigned or self-signed applications are blocked from running.