Friday, March 1, 2013

Design patterns

Design patterns are mainly of three types 
Creational patterns
Creational patterns are ones that 
create objects for you, rather 
than having you instantiate objects directly. This gives your 
program more flexibility in deciding which 
objects need to be created for a given case.
Structural patterns
Structural patterns help you compose 
groups of objects into larger structures, 
such as complex user interfaces or 
accounting data.
Behavioral patterns
Behavioral patterns help you define the 
communication between objects in your 
system and how the flow is controlled in 
a complex program.

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