10 Object Oriented Design principles for the Java programmer

Object Oriented Design Principles are core of OOPS programming but I have seen most of Java programmer chasing design patterns…

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Builder Design pattern in Java

Builder design pattern in Java is a creational pattern i.e. used to create objects, similar to factory method design pattern…

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Chain of Responsibility Pattern in Java

Chain of Responsibility design pattern is needed when a few processors should exist for performing an operation and a particular…

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Testing Abstract Classes and Template Method Pattern

From wikipedia “A template method defines the program skeleton of an algorithm. One or more of the algorithm steps can…

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Solving a Producer-Consumer Problem in Java

The producer-consumer problem is one of the most frequently encountered problems when we attempt multi threaded programming. While not as…

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The Visitor Pattern Re-visited

The visitor pattern is one of the most overrated and yet underestimated patterns in object-oriented design. Overrated, because it is…

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Implementing the State Machine Pattern as a Stream Processor

In my last blog, I said that I really thought that some of the Gang Of Four (GOF) patterns were…

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Java EE Revisits Design Patterns: Observer

Aside from being implemented in many languages and many applications, Observer Pattern has been a part of Java since version…

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The Strategy Pattern

In a recent blog on I received a comment from Wojciech Soczy?ski about how the “strategy” pattern can be used…

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