What is design pattern in programming?

Design patterns are programming language independent strategies for solving a common problem . That means a design pattern represents an idea, not a particular implementation. By using design patterns, you can make your code more flexible, reusable, and maintainable.

As per the design pattern reference book Design Patterns – Elements of Reusable Object-Oriented Software , there are 23 design patterns which can be classified in three categories: Creational, Structural and Behavioral patterns.

Model–view–controller (MVC) is a software design pattern commonly used for developing user interfaces that divide the related program logic into three interconnected elements.

Factory Pattern We can apply a Singleton pattern on the Factory class or make the factory method static. Check out Factory Design Pattern for example program and factory pattern benefits. This is one of the most widely used java design patterns.

Design Patterns