rajadittan/designpatterns4j

designpatterns4j

Learn to code design patterns in Java. The patterns are presented as follows;

1. ####Creational
   • #####Singleton
     • Disable object creation of the Singleton class and ensure only one instance exist and accessible in current VM.
   • #####Prototype
     • Avoid creating object from scratch instead make copies from a known good state of the class instance.
   • #####Builder
     • Step by Step build a complex object using known values.
   • #####Object Pool
     • Avoid expensive acquisition and release of resources by recycling objects that are no longer in use.
2. ####Behavioral
   • #####Observer
     • Notify one ore more registered observers up on changes in the observable.
   • #####Template
     • Create a template method to perform repeated operations.
   • #####Mediator
     • Allow a middleware object to control supplier and consumer needs.
   • #####Command
     • Create and execute irreversible action.
3. ####Structural
   • #####Adapter
     • Make two or more unrelated interfaces to work together.
   • #####Proxy
     • Provide a surrogate to one or more instances of a class thereby controlling access to instances.
   • #####Facade
     • Provide simplified client interface to hide complex interactions between various objects.
   • #####Decorator
     • Add responsibilities at runtime by wrapping up an object without changing the original implementation.
   • #####Bridge
     • Decouple abstractions from implementations thereby allow implementations vary independently.