Jar (file format) Guide, Meaning , Facts, Information and Description
In computing, a Jar file is a zip file. Jar is short for Java Archive. It is used to store compiled Java classes and associated metadata that can constitute a program.An example of how to start a program contained in a jar file: A jar file which has the name "whatever.jar" can be started by entering "java -jar whatever.jar" at the command line.
JAR is a tool for creating compressed file archives. It is the successor of ARJ.