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.

Community driven content discussing all aspects of software development from DevOps to design patterns. Your specific reasons to open a JAR file will determine the right JAR file opener for you to ...

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.

Here's a quick example of how to use Java's jarsigner to digitially sign JAR files.