Creational Patters

• deal with the creation (construction) of objects
• Explicit (constructor) vs implicit (DI, reflection, etc)
• Wholesale (single statement) vs piecewise (step-by-step)

Structural Patterns

• concerned with the structure (e.g. class members)
• many patterns are wrappers that mimic the underlying class interface
• Stress the importance of good API design

Behavioral Patterns

• they are all different; no central theme (solve a particular problem)