Design Patterns Tutorials - JournalDev

Design Patterns

Gangs of Four (GoF) Design Patterns

Gangs of Four Design Patterns is the collection of 23 design patterns from the book “Design Patterns: Elements of Reusable Object-Oriented Software”. This book was first published in 1994 and it’s one of the most….

Android MVVM Design Pattern

In this tutorial, we’ll be discussing and implementing the Android MVVM Architectural Pattern in our Android Application. We’ve previously discussed the Android MVP Pattern. Why do we need these patterns? Adding everything in a Single….

MVC Design Pattern

MVC Design Pattern is one of the oldest architectural pattern for web applications. MVC stands for Model View Controller. MVC Design Pattern is used to separate the logic of different layers in a program in….

DAO Design Pattern

DAO stands for Data Access Object. DAO Design Pattern is used to separate the data persistence logic in a separate layer. This way, the service remains completely in dark about how the low-level operations to….

Factory Design Pattern In Scala

I’m going to deliver a series of Scala Design Patterns in my coming posts. I will pick-up each Java Design Pattern Tutorial explained in JournalDEV and convert it into Scala. We will also discuss about….

Java Dependency Injection – DI Design Pattern Example Tutorial

Java Dependency Injection design pattern allows us to remove the hard-coded dependencies and make our application loosely coupled, extendable and maintainable. We can implement dependency injection in java to move the dependency resolution from compile-time….

Java Design Patterns – Example Tutorial

Design Patterns are very popular among software developers. A design pattern is a well-described solution to a common software problem. I have written extensively on java design patterns. You can download PDF eBook (130+ pages)….

Visitor Design Pattern in 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….

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….

Strategy Design Pattern in Java – Example Tutorial

Strategy design pattern is one of the behavioral design pattern. Strategy pattern is used when we have multiple algorithm for a specific task and client decides the actual implementation to be used at runtime. Strategy….