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5.11.2 Basic jar Operation We have already covered the most common case, using jar to create a “rolled- up” Java application. jar has many command options besides -c and we’ll document a few of them. -c Create a JAR file. -u Update a JAR file—replace updated files, add missing files. -x Extract files from a JAR file. -t List files in a JAR. -f Specify the JAR filename. -v Be verbose—display descriptions of what the jar utility is doing as it does it. -m Add the contents of the named file to the manifest. 5.12 THE REST OF THE TOOLKITThere are additional utilities in the toolkit. Below is a capsule summary of them and their purposes.
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