IntelliJ Concepts
External
Internal
Project
A project is a directory that keeps everything that makes up the application. A typical project has a set of settings and one or several modules. The project provides a mechanism to express dependencies between modules and stores modules' shared configuration.
Module
Grouping Modules
.idea Directory
The .idea directory is used by IntelliJ to store project-related configuration metadata, and it is collocated with the project. It lives by default under the project's root. It contains the following file:
User-Specific Settings
workspace.xml
Stores user-specific settings.
tasks.xml
User Dictionaries
Maintained in .idea/dictionaries/username.xml.
shelf
datasources.xml
In IDEA 13 or earlier, datasources.xml contains user passwords.
libraries
All XML files under .idea/libraries will be generated by the Gradle or the Maven project.
gradle.xml
Gradle settings.
vcs.xml
These are some recommendations on what to share and what not to share in a SVC system. The article applies to Git, but the rules are generally valid:
Debugging
Suspending Only One Thread, and Not All
Right-click on the breakpoint → Suspend → Thread
Optional: Make Default.