Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project

Question

When creating a new Java project in IntelliJ IDEA, the following directories and files are created:

./projectname.iml
./projectname.ipr
./projectname.iws
./s         


        

Answer 1

IntelliJ IDEA 15 & 2016

1. File > Project Structure...

   

   or press Ctrl + Alt + Shift + S

2. Project Settings > Modules > Dependencies > "+" sign > JARs or directories...

   

3. Select the jar file and click on OK, then click on another OK button to confirm

   

   

4. You can view the jar file in the "External Libraries" folder