Design Patterns

1
Design Patterns
2
Singleton

• Want to make sure that only one instance will be
  produced, this is to ensure that the instance
  will be unique.
• Examples are factory.

3
Singleton
Public class Singleton Static public
Singleton getInstance() //note the static
method If (theInstance null)
TheInstance new Singlenton
() return theInstance   protected
Singleton () // initialize instance
field   private static Singlton theInstance
null