design pattern – Program Creek

Java Design Pattern: Bridge

November 13, 2013October 2, 2011 by ProgramCreek

In brief, Bridge Design Pattern is a two layer abstraction. The bridge pattern is meant to “decouple an abstraction from its implementation so that the two can vary independently”. The bridge uses encapsulation, aggregation, and can use inheritance to separate responsibilities into different classes. 1. Bridge pattern story The example of TV and Remote Control(typo … Read more

Java Design Pattern: Visitor

March 2, 2013May 27, 2011 by ProgramCreek

Visitor pattern is a design pattern commonly used in the parser of a compiler, such as Eclipse JDT AST Parser. Basically, there are two interfaces – Visitor and Element – in Visitor pattern. Visitor pattern story Suppose a first time visitor comes to New York City. He want to visit the city and the city … Read more