Jar

File Format
Name	Jar
Ontology	Electronic File Formats Archiving Jar
Extension(s)	.jar, .j
PRONOM	x-fmt/412

This article is about the Java format. For other JAR formats, see JAR (ARJ Software) and JARCS.

A JAR file is a ZIP file that contains an optional META-INF directory. Within the META-INF directory a manifest file (MANIFEST.MF) has a main section and a list of sections for individual JAR file entries. Jar files are used to store and transfer multiple Java applets and their associated files.

Identifiers

• File extension: .JAR

Sample files

• dexvert samples — archive/jar

References

• Java Archive (JAR) Files, Java SE, version 7
• JAR File Specification, version 7
• Package java.util.zip
• ZIP specification from Info-ZIP on which the java.util.zip classes are based