OOP Terminology

• If a class C₁ is a subclass of class C₂, then
  • C₂ is the base class and C₁ is derived from C₂ (C++ terminology)

  • C₁ extends C₂ (Java terminology)

• The ancestry of a class consists of all classes it is derived from, directly or indirectly.

  Example: the ancestry of the OxfordShirt class is the Item class and the OxfordShirt class.

• The set of subclass relationships in a class diagram is called the class hierarchy.