How to use Jar Tool

You can package your classes in a jar file and that Jar file can be used in class path.

Following commands needs to be executed for various purposes in managing Jar files.

1. jar cf jar-file inputfiles: It is used to create new JAR.
2. jar tf jar-file: It is used to view all the files of the JAR.
3. jar xf jar-file: It is used to extract the JAR.
4. java -jar app.jar: It is used to run a JAR if the manifest file is present in the JAR. This manifest file contains the information of the file having main method. Content of the manifest is:
   Main-Class: classname

for more details: Java Tips