The Singleton pattern

Reference types, Value types, and Patterns - slide 25 : 29

Problem: For some classes we wish to guarantee that at most one instance of the class can be made.

Solution: The singleton design pattern

A template of a singleton class.

A singleton Die class.

Application of the singleton Die class.

Output of singleton Die application.

A singleton Die is - most probably - not very useful.

On the next slide we will show a singleton Random, which solves a real problem