Design Patterns

URL: https://www.progressiverobot.com/mediator-design-pattern-java/ Mediator design pattern is one of the behavioral design pattern, so it deals with the behaviors of objects. Mediator design pattern is used to provide a centralized communication medium between different objects in a system. Mediator Design Pattern  According to GoF, mediator pattern intent is: […]

Today we will look into Bridge Design Pattern in java. When we have interface hierarchies in both interfaces as well as implementations, then bridge design pattern is used to decouple the interfaces from implementation and hiding the implementation details from the client programs. Bridge Design Pattern Just like [Adapter pattern](/community/tutorials/adapter-design-pattern-java "Adapter Design Pattern in Java […]

URL: https://www.progressiverobot.com/observer-design-pattern-in-java/ Observer Pattern is one of the behavioral design pattern. Observer design pattern is useful when you are interested in the state of an object and want to get notified whenever there is any change. In observer pattern, the object that watch on the state of another object are called Observer and the object […]

Today we will look into Builder pattern in java. Builder design pattern is a creational design pattern like [Factory Pattern](/community/tutorials/factory-design-pattern-in-java "Factory Design Pattern in Java") and [Abstract Factory Pattern](/community/tutorials/abstract-factory-design-pattern-in-java "Abstract Factory Design Pattern in Java"). Builder Design Pattern  Builder pattern was introduced to solve some of […]

URL: https://www.progressiverobot.com/prototype-design-pattern-in-java/ Prototype design pattern is one of the Creational Design pattern, so it provides a mechanism of object creation. Prototype Design Pattern  Prototype design pattern is used when the Object creation is a costly affair and requires a lot of time and resources and you have a similar object already existing. […]

Chain of responsibility design pattern is one of the behavioral design pattern. Chain of Responsibility Design Pattern  Chain of responsibility pattern is used to achieve loose coupling in software design where a request from client is passed to […]

URL: https://www.progressiverobot.com/proxy-design-pattern/ Proxy Design pattern is one of the Structural design pattern and in my opinion one of the simplest pattern to understand. Proxy Design Pattern  Proxy design pattern intent according to GoF is: Provide a surrogate or placeholder for another object to control access to it. The definition itself is very […]

Command Pattern is one of the Behavioral Design Pattern. Command design pattern is used to implement loose coupling in a request-response model. Command Pattern  In command pattern, the request is send to the invoker and invoker pass it to the encapsulated command object. Command object passes the request to the […]

URL: https://www.progressiverobot.com/state-design-pattern-java/ State design pattern is one of the behavioral design pattern. State design pattern is used when an Object change its behavior based on its internal state. State Design Pattern  If we have to change the behavior of an object based on its state, […]