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Home > Jar (file format)


 

In computing, a Jar file (short for Java ARchive) is a zip file used to distribute a set of Java classes. It is used to store compiled Java classes and associated metadata that can constitute a program.

Jar files which are intended to be executed as standalone programs will have one of their classes specified as the "main" class. Such jars are typically started with a command similar to "java -jar foo.jar".

Jar is also the name of any software tool which creates Jar files.

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