The chain of responsibility pattern is used to achieve loose-coupling in software design where a request from the client is passed to a chain of objects to process them. Then the object in the chain will decide who will be processing the request and whether the request is required to be sent to the next object in the chain or not. Structural design patterns provide different ways to create a Class structure (for example, using inheritance and composition to create a large Object from small Objects). Adapter Method is a structural design pattern, it allows you to make two incompatible interfaces work together by creating a bridge between them.
This is also a very hands-on course where the author will show you how to implement a particular design pattern live on IntelliJ IDEA. Most demos are also a single-file, so you can also download the file attached to the lesson and run it in Intelli IDEA, Eclipse, NetBeans, or another IDE of your choice. Design patterns are nothing but a tried and tested solution of common programming problems, for example, the creational design patterns deal with the problems of object creation. These principles help to create flexible and reusable software designs that can be easily adapted to changing requirements. Design patterns provide a common language and shared understanding among developers, making it easier to communicate and collaborate on software projects. In this course, you’ll learn to solve real-world software development problems using Java best practices and design patterns.
Builder is a creational design pattern that lets you construct complex objects step by step. The pattern allows you to…
It also serves as a practical guide to using design patterns to create sophisticated, robust Java programs. The best part of this course is the Capstone Project where you will redesign an existing Java-based Android application to implement a combination of design patterns. By the way, you would need a Pluralsight membership to join this course which costs around $29 per month or $299 per year (14% discount). I highly recommend this subscription to all programmers as it provides instant access to more than 7000+ online courses to learn any tech skill. Alternatively, you can also use their 10-day-free-pass to watch this course for FREE.
The state pattern is used to provide a systematic and loosely-coupled way to achieve this through context and state implementations. One of the best examples of this pattern is the Collections.sort() method that takes the Comparator parameter. Based on the different implementations of comparator interfaces, the objects are getting sorted in different ways. The mediator design pattern is used to provide Java Design Patterns Lessons a centralized communication medium between different objects in a system. If the objects interact with each other directly, the system components are tightly-coupled with each other which makes maintainability cost higher and not flexible to extend easily. The mediator pattern focuses on providing a mediator between objects for communication and implementing loose-coupling between objects.
Core Java Design Patterns
The inner class is called “Memento”, and it’s private so that it can’t be accessed from other objects. The command pattern is used to implement loose-coupling in a request-response model. In this pattern, the request is sent to the invoker and the invoker passes it to the encapsulated command object. The command object passes the request to the appropriate method of receiver to perform the specific action. Here every catch block is kind of a processor to process that particular exception.
