There are many cases in which we want to use a separated library in the project we develop. This is the case with using the Facebook SDK for Android and this is the case with using the Google Play Services library. The following short video clip shows how to add a reference for a separated library project.

Stable Values in Java (JEP 502): Deferred Immutability with JVM Trust
Explore Stable Values – a new Java 25 upcoming feature (JEP 502) enabling lazy initialization with immutable performance and JVM-level optimizations.