View sources of used Java classes in IntelliJ Idea

Question

In visual studio development environment when you use a library if you have the related pdb you can dig into their sources during debug. I wonder is there any way to have this f

Answer 1

Project Structure | Libraries (or Module Dependencies if libraries are defined there):

Then in the libries tab click on the plus mark:

Select the source type:

Then you have to select the source path and add the wanted libraries finally click apply!