Common usages of the jar tool

Function
Command

Creating a JAR file from individual files
jar cf jar-file input-file...

Creating a JAR file from a directory
jar cf jar-file dir-name

Creating an uncompressed JAR file
jar cf0 jar-file dir-name

Updating a JAR file
jar uf jar-file input-file...

Viewing the contents of a JAR file
jar tf jar-file

Extracting the contents of a JAR file
jar xf jar-file

Extracting specific files from a JAR file
jar xf jar-file archived-file...

Running an application packaged as an executable JAR file
java -jar app.jar

Reference : Explore the power of the JAR file format