The library includes numerous examples of static member classes, some of which are found in the Java 2D geometric shape classes located in the java.awt.geom package.

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

Java currently supports only primitive types and object references. Project Valhalla extends this by introducing inline classes which are new types that exhibit some behaviors of both types of value.

Java employs its own binary serialization stream protocol. Serialization is achieved through a combination of the ObjectOutputStream and ObjectInputStream classes, and the implementation of marker ...

While there are workarounds -- for example, you could introduce a Factory class to generate transaction objects -- this adds complexity and could become a maintenance burden. Another approach could be ...