Please follow these steps from your IDE( IntelliJ IDEA):

File -> Project Structure -> Project Settings -> Artifacts -> Click on + (plus sign) -> Jar -> Select option 'From modules with dependencies...'

Select a Main Class (or Application class) if you need to make the jar runnable.

Select Extract to the target Jar

Click OK

Click Apply/OK

Now click on build menu from Menu bar and follow these steps:

Build -> Build Artifact -> Build