Core Java Skills Every Java Developer Must Know To Succeed 

Java is a well-known programming language. It is a compiled language with object code that is not tied to a processor or machine, making it suitable for cross-platform applications such as web applications and server-side programming. 

• Java is currently the most popular programming language for developing Android applications. It is used in cloud applications, machine learning environments, and Internet of Things technology.
• With such an upward trend, it’s no surprise that businesses of all sizes are preparing to establish their online presence, and Java is the quickest way to get there. 
• Java developers can deliver on all fronts, from front-end to back-end to full-stack development, and help businesses achieve their organizational goals.

It’s no surprise that businesses of all sizes are preparing to establish their online presence, and Java is the quickest way to get there. Java developers can deliver on all fronts and help businesses achieve their organizational goals, from front-end to back-end to full-stack development.

Core Java Fundamentals on The Most Important Skill Set for Java Developers

Core Java developer skills revolve around the fundamental skills required to qualify as a Java developer. Because these are the fundamental principles of Java, candidates must demonstrate a command of these fundamentals to demonstrate a thorough understanding of Java development.

OOP Concepts

The guiding principle of Java programming is Object Oriented Programming. It introduces classes and object-style coding by bundling data and functions to improve code modularity, performance, security, and consistency. 

• The summary shows only relevant data to the user and hides problems.
• Inheritance is a mechanism that allows a child class to inherit specific properties or characteristics from its parent or superclass.
• Polymorphism allows for the use of a single interface regardless of the underlying forms, whether they are data types or classes.
• Encapsulation is the process of tying data to the code that manipulates it and protecting it from outside manipulation.

Interface

A Java interface is a group of abstract methods. Constants, static methods, default methods, and nested types are also included. Having these Java developer basic skills will allow the programmer to code and perform smooth software development tasks.

Serialization/Deserialization

Sorting is the process of converting an object into an array of bytes. Serialization, on the other hand, allows you to create an object from a byte stream. The former is primarily used in technologies such as Hibernate, JPA, RMI, JMS, and EJB.

Understanding the Fundamentals of Java Web Application Development

If you need to fill a position that requires multi-tier skills in web application development and building software solutions, Java should be a mission-critical component of your company’s tech stack.

Java web technologies provide developers with the knowledge and skills needed to create rich, engaging, and dynamic web applications. As a result, you must look for these essential Java developer skills in your prospects, whether they are front-end, back-end, or full-stack.

• HTML (HyperText Markup Language) is a programming language that forms the foundation of any web page. This is a good place to start for any aspiring web content developer.
• CSS (Cascading Style Sheets) is a programming language that governs how HTML elements on a website appear at the user end of the page. It enables developers to manipulate the design and layout of web content so that it appears organized and well-formatted.
• JavaScript is a logic-based programming language used to create and modify web content so that elements can interact with one another dynamically.
• JSP (Java Server Pages) technology has facilitated the rapid development of dynamic web applications that are platform and server-independent.
• Servlet API: A servlet is a Java technology API that contains several interfaces and classes for building and running web applications. It provides platform-specific services to its users.

Java Backend Developer Specialization

As for the skills required for Java web developers, they must also have a solid understanding of the various web frameworks involved. Frameworks are tools that contain pre-written code that serves as a template or reference. 

Developers can reuse these frameworks and modify them as needed to create new applications or solutions without having to write code from scratch. 

Screening knowledge of Java Web Framework is important when hiring as it is a highly specialized backend developer skill in 2022.

• Spring: Spring is widely used by developers because of its speed, simplicity, safety, and efficiency. Spring MVC and Spring Boot, its two variants, supercharge Java to make it reactive, modern, and cloud-ready.
• Java Server Faces: JSF, which is maintained by Oracle, encapsulates a variety of client-side technologies such as CSS, JavaScript, and HTML to design UIs without having to learn the technologies separately.
• Hibernate: If your organization works with multiple databases, you should look for a Java developer who is familiar with Hibernate. Hibernate uses Object-Relational Mapping (ORM) to associate Java classes with database cells or tables.
• Google Web Toolkit: Google Web Toolkit is often used by companies looking to build complex, high-performance web applications in Java. Knowing how to use it now and in the future will benefit any developer.
• Struts: Enterprise-grade Java applications frequently use Struts to shorten development times. Struts are compatible with other Java frameworks as well as plugins that support AJAX, JSON, and REST integration.

System Design and Architecture with the Help of a Pro Java Developer

System design and Architecture are the foundation of any application, be it software, website, or anything else. As developers leverage their Java development experience and problem-solving skills as needed, working knowledge of Java design patterns will undoubtedly help them create appropriate solutions. Design patterns are standardized and tested solutions to commonly encountered problems.

• Examples of creative design patterns include Singleton Pattern, Factory Pattern, Abstract Factory Pattern, Builder Pattern, and Prototype Pattern.
• Examples of structural design patterns include the adapter pattern, composite pattern, proxy pattern, flyweight pattern, facet pattern, bridge pattern, and decorator pattern.
• Examples of behavioral design patterns include the template pattern, mediator pattern, chain of responsibility pattern, observer pattern, strategy pattern, command pattern, state pattern, visitor pattern, interpreter pattern, iterator pattern, and memento pattern.
• Examples of other Miscellaneous design patterns include the DAO design pattern, dependency injection pattern, and MVC pattern.

Apart from the design-related Java developer skills mentioned above, developers must also have the practical skills to turn these designs into more functional structures. Traditionally, Java applications have been supported by a large, monolithic architecture. However, we see deviations from this trend as structures become smaller, more limited, and distributed.

Learn More About DevOps Tools

Regardless of the programming language used by any business, DevOps plays a game-changing role in streamlining the software development lifecycle. It promotes Java development by promoting the principles of Continuous Integration (CI) and Continuous Development (CD).

• Apache ANT is a Java library and command-line tool for automating software development processes.
• Apache Maven: Maven, like ANT, is a build automation tool that aids in the development, publishing, and deployment of multiple projects at the same time.
• Git is an open-source version control system that allows programmers to track and collaborate on projects.
• Docker is a high-end container management DevOps tool for building, shipping, and running distributed applications across multiple systems.
• Ansible is a DevOps tool that can be used to automate application deployment, intra-service orchestration, cloud provisioning, and other tasks. It can be used by developers to achieve peak productivity while scaling automation.
• Jenkins is a useful DevOps tool that monitors the execution of recurring tasks, laying the groundwork for continuous integration.