Design Patterns

Composite pattern is one of the Structural design pattern. Composite design pattern is used when we have to represent a part-whole hierarchy. Composite Design Pattern  When we need to create a structure in a way that the objects in the structure has to be treated the same way, we can […]

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/template-method-design-pattern-in-java/ Template Method is a behavioral design pattern. Template Method design pattern is used to create a method stub and deferring some of the steps of implementation to the subclasses. Template Method Design Pattern Template method defines the steps to execute an algorithm and it can provide default implementation that might be common for […]

Today we will look into Flyweight design pattern. Flyweight Design Pattern According to GoF, flyweight design pattern intent is: > Use sharing to support large numbers of fine-grained objects efficiently Flyweight design pattern is a Structural design pattern like [Facade pattern](/community/tutorials/facade-design-pattern-in-java "Facade Pattern in Java – Example Tutorial"), [Adapter Pattern](/community/tutorials/adapter-design-pattern-java "Adapter Design Pattern in Java […]

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, […]

URL: https://www.progressiverobot.com/visitor-design-pattern-java/ Visitor Design Pattern is one of the behavioral design pattern. Visitor Design Pattern Visitor pattern is used when we have to perform an operation on a group of similar kind of Objects. With the help of visitor pattern, we can move the operational logic from the objects to another class. For example, think […]

Welcome to the Factory Design Pattern in Java tutorial. Factory Pattern is one of the Creational Design pattern and it's widely used in JDK as well as frameworks like Spring and Struts. Factory Design Pattern  The factory design pattern […]

URL: https://www.progressiverobot.com/java-singleton-design-pattern-best-practices-examples/ Introduction _Java Singleton Pattern_ is one of the _Gangs of Four Design patterns_ and comes in the _Creational Design Pattern_ category. From the definition, it seems to be a straightforward design pattern, but when it comes to implementation, it comes with a lot of concerns. In this article, we will learn about singleton […]

Facade Design Pattern is one of the Structural design patterns (such as [Adapter pattern](/community/tutorials/adapter-design-pattern-java "Adapter Design Pattern in Java – Example Tutorial") and [Decorator pattern](/community/tutorials/decorator-design-pattern-in-java-example "Decorator Pattern in Java – Example Tutorial")). Facade design pattern is used to help client applications to easily interact with the system. Facade Design Pattern ![facade design pattern, facade pattern, […]