You can also install a compressed JAR file if you first expand the compressed file using the x option of the jar command. In this UNIX example, abcPackage is a compressed file.
Place the compressed JAR file in an empty directory and expand it:
jar xf0 abcPackage.jar
Delete the compressed JAR file so that it won’t be included in the new, uncompressed JAR file:
Create the uncompressed JAR file:
jar cf0 abcPackage.jar*