How to create a JAR file?

You can create a JAR file using the following command.

jar cf jar-file input-file(s)  

You can also create JAR files using IDE’s. To create a JAR file using eclipse follow the procedure given below.

Open the Jar File wizard

The Jar File wizard can be used to export the content of a project into a jar file. To bring up the Jar File wizard −

• In the Package Explorer select the items that you want to export. If you want to export all the classes and resources in the project just select the project.
• Click on the File menu and select Export.
• In the filter text box of the first page of the export wizard type in JAR.

• Under the Java category select JAR file.
•  Click on Next.

Using the Jar File wizard

In the JAR File Specification page −

• Enter the JAR file name and folder.
• The default is to export only the classes. To export the source code also, click on the Export Java source files and resources checkbox.

• Click on Next to change the JAR packaging options.
• Click on Next to change the JAR Manifest specification
• Click on Finish.