What is JAR file?

What is JAR file?

JAR is a Java Archived file which allows many files to be stored. All applets and classes can be stored in a JAR file thereby reducing the size. JAR files can be created using the JAR command that comes with JDK. This JAR file can also be digitally signed. In this case, the JAR file itself is not signed. But, all the files inside it are signed.

JAR file (or Java ARchive) is a file format used for aggregating many files into one.
Java Archive (JAR) files are compressed files into which you can store many files.
A JAR file can be created by the command-line jar tool, or by using the java.util.jar API in the Java platform.
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