![]() Package Sealing: Packages stored in *.jar files can be optionally sealed so that the package can enforce version consistency. ![]() By using the JAR file format, you can turn your software into extensions as well. Java 3D and JavaMail are examples of extensions developed by Sun. Packaging for extensions: The extensions framework provides a means by which you can add functionality to the Java core platform, and the JAR file format defines the packaging for extensions. Users who recognize your signature can then optionally grant your software security privileges it wouldn't otherwise have.ĭecreased download time: If your applet is bundled in a JAR file, the applet's class files and associated resources can be downloaded to a browser in a single HTTP transaction without the need for opening a new connection for each file.Ĭompression: The JAR format allows you to compress your files for efficient storage. Security: You can digitally sign the contents of a jar file. ![]() The JAR file format provides many benefits: Typically a jar file contains the class files and auxiliary resources associated with applets and applications. The Java Archive (JAR) file format enables you to bundle multiple files into a single archive file. The jar file extension is mainly associated with Java and used for Java archives.
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