Contents
Using JAR Files: The Basics
| Operation | Command |
|---|---|
| To create a JAR file | jar cf jar-file input-file(s) |
| To view the contents of a JAR file | jar tf jar-file |
| To extract the contents of a JAR file | jar xf jar-file |
| To extract specific files from a JAR file | jar xf jar-file archived-file(s) |
| To run an application packaged as a JAR file (requires the Main-class manifest header) |
java -jar app.jar |
jar Options
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$ jar Usage: jar {ctxui}[vfmn0PMe] [jar-file] [manifest-file] [entry-point] [-C dir] files ... Options: -c create new archive -t list table of contents for archive -x extract named (or all) files from archive -u update existing archive -v generate verbose output on standard output -f specify archive file name -m include manifest information from specified manifest file -e specify application entry point for stand-alone application bundled into an executable jar file -0 store only; use no ZIP compression -P preserve leading '/' (absolute path) and ".." (parent directory) components from file names -M do not create a manifest file for the entries -i generate index information for the specified jar files -C change to the specified directory and include the following file |
As usual, the order in which the x and f options appear in the command doesn’t matter, but there must not be a space between them.
Caution: When it extracts files, the Jar tool will overwrite any existing files having the same pathname as the extracted files.
Example
Create a jar:
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$ jar cf WordCount.jar WordCount*.class |
Extract a jar:
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jar xf WordCount.jar |