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

I use this method and it works well:

1- Copy And paste the .jar files under the libs folder.

2- Add compile fileTree(dir: 'libs', include: '*.jar') to dependencies in build.gradle then all the jars in the libs folder will be included..

3- Right click on libs folder and select 'Add as library' option from the list.