Design Patterns & Principles

Design patterns and principles
1.	Design Principle vs. Design Pattern
2.	What algorithm is used in modern day elevators?
3.	Singleton Design Pattern - A Creational Design Patterns
4.	Factory Method Pattern (Virtual Constructor)
5.	Prototype Design Pattern
6.	Builder Design Pattern in Java
7.	Abstract Factory
8	Proxy Pattern
9	Flyweight Pattern - A Structural design pattern
10	Decorator design pattern
11	Adapter Pattern
12	Bridge Pattern
13	Composite Pattern
14	Facade pattern
15	Template Method Pattern
16	Strategy Pattern (Policy Pattern) - A behavioral design pattern
17	Iterator pattern or Cursor
18	Mediator pattern
19	Memento Design Pattern in Java
20	Observer pattern or Publish-subscribe pattern
21	State
22	Pizza Factory design in Java