How to add Jar libraries to an IntelliJ Idea SBT Scala project?

Just Declare this in build.sbt

unmanagedJars in Compile += file(Path.userHome+"/Your-Jar-Path/Full-Jar-Name.jar")

and required jar will appear in External Library>unmanaged-jars>Full-Jar-Name.jar. This will also change if the jar file(in the provided path) is modified.

In Intellij Idea:

• File > Project Structure > Libraries

In Netbeans:

• File > Project Properties > Libraries

In Eclipse:

• Right click the project > Properties > Java Build Path > Libraries

The better way to do it is to add your unmanaged dependencies to your build.sbt and refrain from leaving part of your dependency management to your IDE.

Refer to http://www.scala-sbt.org/release/docs/Library-Management.html for details on how to define your unmanagedBase and unmanagedJars tasks.

In the IntelliJ Idea window of your project, got to File >> Project structure >> Libraries. After clicking that Libraries option, two panes will show up. At the top of the left-most pane, click the green "+" button.