Java 8: Glossary of a session

OCP

Open/Closed Principle

Open for extension, Closed for modification Principle

SAM / Function Object

Only one method in a class. See: @FunctionalInterface; eg. Callable or Runnable.

Covariant Overriding

During inheritance, an overridden method's return type can be changed to one of it's subtypes. Eg. when overriding clone().

Erasure

Type parameters are removed from the types in the class bytecode.