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.

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 ...

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