Introduction to Design Pattern in Java

Design Patterns are a very popular problem-solving technique among software developers. It contains all the solution for common software problems occurred while developing and designing software and has well-described solutions.

The codes are a re-usable form of a solution to the problem. They are introduced by architect Christopher Alexander and are used as best practices for various other disciplines of software developers to come across the commonly faced problems while creating software. It is flexible and contains templates to solve while designing a system or applications.

What is Design Pattern in Java

It is used by experienced object-oriented software developers to have flexible coding and reusing the codes and can add new codes into existing codes for version updates. It has solutions to all general problem faced by software engineers they are taken by trial and error by numerous developers over a period of time.
Using JAVA language we can design and develop few applications and softwares along with the best practices by following the workflow of Design Pattern.

Understanding Design Pattern in Java

There are different creative, structural and behavioral ways to design patterns to provide solutions in the form of instantiating an object in the best possible way for particular situations based on pattern structure type. Different types of patterns are

1. Singleton Pattern

It restricts the instantiation of a class to only one instance class exists in Java virtual machine. Handling one instance class in the machine at once is simple for designing patterns but when it comes to Implementation of concerns many developers have a different style of fixing problems, to know more details developer must know complete different ways to implement Singleton pattern, pros, cons of each method which are most discussed java design patterns.

2. Factory Pattern

It is based on the inputs from clients we create or have a superclass with its multiple sub-classes. This is the most widely used java design pattern because this pattern takes the responsibility of instantiation of a class from the client program to the functional class. This pattern is flexible to apply Singleton pattern on factory class or even we can make factory class static.

3. Abstract Factory Pattern

It’s similar to the factory and can contain many factories in it, we can design many factories and relations with the design pattern in java. Simple factory class and many subclasses based on the input provides and switch statements to achieve as per project requirements, it helps in improving the patterns while programming.

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4. Builder Pattern

This pattern is the best one to solve some problems with factory and abstract factory design patterns when objects contain many attributions. Building pattern solves issues with a large number of optional parameters and inconsistent ways of building the object step by step with a method which takes developers to reach the final object by the end.

5. Prototype Pattern

This is used if the object creation is costly and can’t be offered it takes a lot of time and resources to develop already existing simple objects and add codes to improve and make new objects with modifications as per needs in java cloning.

Prototype design pattern has the object copying, provide the copying features. It should not be done by any other class whether to use the shallow or deep copy of object properties depends on requirements and its design decision.

How does Design Pattern in Java make working so easy?

Design Patterns have evolved as the best problem-solving patterns provider for these days. It has all the standard approach to provide for the solutions to the common problem in the building phase of the software application or software. It is the IT industry best practices and saves a lot of time and provides sensible patterns as required to developers.

With design patterns, the developer can work and develop on the robust processes and maintainable codes. It has the option of reusable codes which reduce the total development cost of application.

It simplifies job to testers and new learn to understand the patterns and modify them as per demands, software engineers can easily fix problems if any noticed at any stage of design, testing and operations of the application or software.

Fast to develop in the context of Java, design patterns are divided into creative, structural and behavioral Which can be easily understood and applied while coding multiple objects, classes etc. , version updates and slight changes can be done and coding and patterns can be taken for reference for building new software’s.

The various subsets of Design Pattern in Java

Structural design patterns are the ways to create class strictures using inheritance and composition from large objects to small objects.

1. Adopter Pattern

It helps in joining to unrelated interfaces to work together with the objects. This is one of the useful pattern used in Java development of software designing.

2. Composite Pattern

Composite patterns are one of the structural design patterns used. If we have to represent a part-whole hierarchy and need to create a new stricture in the way that the objects in the structure can be treated the same way. A specific purposes composition patterns as per requirements operations.

3. Proxy Pattern

It provides a placeholder or surrogate for other objects to control access to it. Proxy patterns are used when we want to provide controlled access to functionality. It also has implementation requirements as per needs.

4. Flyweight Pattern

Flyweight pattern is used when we have demanded to create many objects of a class. So that every object consumes memory space that can be crucial for low memory devices.

5. Facade Pattern

This is used in helping the client applications to easily interact with the systems. The interface can be used by My SQL, Oracle databases to generate different types of logs or reports using HTML, PDF etc. , different interfaces with different databases as per clients needs. It improves client application and usage with good relations with clients.

6. Bridge Pattern

It contains both interface and implementation, bridge pattern is used to decouple the interface from implementation by hiding implementation details from clients program.

7. Decorator Pattern

A decorator is used to modify the functionality of the object at runtime at the same time. Other instances of the same class will not be affected by this. We use compositions to extend the behavior of an object with time and applicability on the instances of the class.

What can you do with Design Pattern in Java?

Behavioral design patterns help in creating or modifying existing application as per the latest updates in the market and benchmark with client’s demands for smooth flow of the process.

The design stricture of an application using patterns can be well understood by software developers and make changes in a different location as per version update requests by end-user, developer and client. Easy structure for developers, tester and other professional.

Reusable codes and easily maintained with quick tracking solutions using simple patterns if any problems occur in the performance of the application or system. Solving all the problems and develop well-structured application or software’s to compete in the market with industrial standards.

Working with Design Pattern in Java

Design Patterns are a very popular problem-solving technique used by software designers when creating or modifying application or software programs. It helps in creating simple and easy structured software which can be easily understood by testers, developers and users for their using.

Maintaining and adding new attributions as per version demands can be easily done, bugs can be found and quickly fix if observed. Developers can use repeated codes if needed; we can work on multiple interfaces and can bridge them. Adds professional values to the experienced and junior software designing and development experts. Tool update and provide the latest codes for common mistakes occurred in design patterns.

Advantages of Design Pattern in Java

This helps in designing smart and flexible codes as per project requirements with suitable objects, classes, loosely coupled codes, quick understanding strictures and many more. Unwanted codes and problems can be easily identified and changed helpless work to testers and maintainers of application. Client and end users fell the interface more user-friendly and provide good user experience while working or using application or software.

Required skills

To understand Design Patterns we need to have basic knowledge of coding.

Must know the application and software designing and maintaining procedures so that the concepts and syllabus can be matched to real-time usage.

Must know at Java or a student’s of IT, CSC pursue this course as they have a semester and now java in their graduation course.

Why should we use Design Pattern in Java?

In IT industry coding and application design and structure play a key role in the success of the application or software. This jobs of designing effective software with easy and simple patterns can be done using design patterns in java. Many hugs and robust designs can be maintained and executed quickly because of design patterns. It identifies the common mistakes in coding in the phase of design and reduces the cost of ownership.

Scope

Design Patterns are very popular and are used by many professional companies all over the world for designing and developing software programs and application. It has high industrial usage and helps in designing, testing, maintaining and reusing the coding for multiple processes. It’s easy to fix the issue at any phase of application due to it’s easy to understand stricture to identify the code of problem with suitable solutions to fix it. It deals with dynamics change at runtime and class scopes at the time of built.

Why do we need Design Pattern in Java?

Design Patterns coding is designed with simple and repeated similar codes as per requirements of the projects which can be handled and maintained with basic knowledge, because of this the application and software are designed and developed using design patterns can be maintained easily.

The design patterns help the testers, software developers and others to avoid problems or bugs while working even to identify the bugs in application or system we can find them quickly and can fix them in less time. Design patterns with java also help to add new coding and features to application or system as per customer feedback or internal developments very smoothly for the latest or upcoming versions of the software.

It has all the best things for designing an application like user-friendly interface and experience, can be understood and can be modified as required easily by software engineers, quick monitoring and problem-solving solutions makes design pattern in java a professional practice of making software.

Who is the right audience for learning Design Pattern in Java technologies?

Computer graduates and experienced IT professionals who are interested and experienced in designing, development of application and software’s can learn this courses to know the best practices and improve their skills while designing and developing software and applications.

How this technology will help you in career growth?

Design patterns course helps to gain a complete skill set on designing and developing software application in professional requirements and structure of software requirements.

By doing this course we can get good software designing job opportunities in multiple companies. We can upgrade the adopt multiple codes as per the latest requirements for clients and project demands.

Conclusion

Design Patterns provides creating ability skills to make a smart and interactive application and software’s with simple and easy problem solving and understanding patterns and works which help in making best user-friendly applications and update it versions easily with latest requirements. To get the best IT job in the global market.

The tool provides flexible coding patterns and methods of structure, reusable codes, loosely written codes, classes, patterns, etc., and this entire makes Design patterns interesting to deal.