Java Patterns: Types
Java Fundamentals and Patterns
1 Overview
📘 Design-patterns
In Java, a design pattern is a general repeatable solution to a commonly occurring problem in software design.
A design pattern is not a finished design that can be transformed directly into code, but rather it is a description or template that can be used to solve a problem that is commonly encountered in software development.
2 Design Patterns
There are many different design patterns that have been identified and documented, and each pattern provides a different solution to a specific problem.
Some of the most important design patterns in Java include:
- the singleton,
- the factory,
- the abstract factory
- the observer,
- and the builder.
These patterns are commonly used in Java because they provide solutions to common problems that are encountered in software development, and they can help to make your code more efficient, reusable, and maintainable.
Design patterns do not guarantee an absolute solution to a problem.
They provide clarity to the system architecture and the possibility of building a better system.
3 Design Pattern Classification
We have 3 main types of Design Patterns:
3.1 Creational
It deals with the creation of objects and classes. They provide a way to create objects while hiding the complexity of the actual creation process. Some creational design patterns are:
3.2 Structural
It deals with object composition. They provide a way to compose objects and classes in a way that is flexible and efficient. Some structural design patterns are:
3.3 Behavioral
It deals with communication between objects and classes. They provide a way to define the communication between objects in a way that is decoupled from the actual objects that are communicating. Some examples of behavioural patterns are:
4 Advantage of design patterns
- They are reusable in multiple projects.
- They provide the solutions that help to define the system architecture.
- They capture the software engineering experiences.
- They provide transparency to the design of an application.
- They are well-proved and testified solutions since they have been built upon the knowledge and experience of expert software developers.
We must use the design patterns during the analysis and requirement phase of SDLC(Software Development Life Cycle).
Design patterns ease the analysis and requirement phase of SDLC by providing information based on prior hands-on experiences.
5 Design Patterns Cheat-sheet
