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The Bridge Pattern in Java 1. Overview The official definition for Bridge design pattern introduced by Gang of Four (GoF) is to decouple an abstraction from its implementation so that the two can vary independently. This means to create a bridge interface that uses OOP principles to separate out responsibilities… Continue Reading java-bridge-pattern
Prototype Pattern in Java 1. Introduction In this tutorial, we’re going to learn about one of the Creational Design Patterns – the Prototype pattern. At first, we’ll explain this pattern and then proceed to implement it in Java. We’ll also discuss some of its advantages and disadvantages. 2. Prototype Pattern… Continue Reading java-pattern-prototype
Memento Design Pattern in Java 1. Overview In this tutorial, we’ll learn what the Memento Design Pattern is and how to use it. First, we’ll go through a bit of theory. Then, we’ll create an example where we’ll illustrate the usage of the pattern. 2. What is the Memento Design… Continue Reading java-memento-design-pattern
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The Decorator Pattern in Java 1. Overview A Decorator pattern can be used to attach additional responsibilities to an object either statically or dynamically. A Decorator provides an enhanced interface to the original object. In the implementation of this pattern, we prefer composition over an inheritance – so that we… Continue Reading java-decorator-pattern
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Abstract Factory Pattern in Java 1. Overview In this article, we’ll discuss the Abstract Factory design pattern. The book Design Patterns: Elements of Reusable Object-Oriented Software states that an Abstract Factory “provides an interface for creating families of related or dependent objects without specifying their concrete classes”. In other words, this model… Continue Reading java-abstract-factory-pattern
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Facade Design Pattern in Java 1. Introduction In this quick tutorial, we’re going to take a look at one of the structural design patterns: the Facade. First, we’ll give an overview of the pattern, list its benefits and describe what problems it solves. Then, we’ll apply the facade pattern to an… Continue Reading java-facade-pattern
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Using the @Singular Annotation with Lombok Builders 1. Overview The Lombok library provides a great way of simplifying data objects. One of the key features of Project Lombok is the @Builder annotation, which automatically creates Builder classes for creating immutable objects. However, populating collections in our objects can be clumsy… Continue Reading lombok-builder-singular
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The Command Pattern in Java 1. Overview The command pattern is a behavioral design pattern and is part of the GoF‘s formal list of design patterns. Simply put, the pattern intends to encapsulate in an object all the data required for performing a given action (command), including what method to call,… Continue Reading java-command-pattern
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Interpreter Design Pattern in Java 1. Overview In this tutorial, we’ll introduce one of the behavioral GoF design patterns – the Interpreter. At first, we’ll give an overview of its purpose and explain the problem it tries to solve. Then, we’ll have a look at Interpreter’s UML diagram and implementation… Continue Reading java-interpreter-pattern
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Strategy Design Pattern in Java 8 1. Introduction In this article, we’ll look at how we can implement the strategy design pattern in Java 8. First, we’ll give an overview of the pattern, and explain how it’s been traditionally implemented in older versions of Java. Next, we’ll try out the… Continue Reading java-strategy-pattern
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