Design patterns in java

Design Pattern is a reusable and named solution to a recurring problem in a context. There are 3 categories of patterns when classified by the purpose:

• Structural Design Patterns
  • Strategy Pattern: Defines a family of algorithms, encapsulates them and makes them interchangeable thus Strategy lets algorithm vary independently from the clients that use it. Example: Collections Java, List
• Creational Design Patterns: Allows creational of the objects
  • Abstract Design factory pattern
• Behavioural Design Patterns

Reference Books for Design patterns:

• The Gang of Four: The Definitive Design Patterns Book
• Head first Design patterns