The junior Java developer role does not call for a lot of Java expertise. But in addition to having a solid understanding of the fundamentals of Servlet and JSP, one should also be familiar with object-oriented programming, a basic understanding of front-end development. In addition to those questions, make sure to check out Leetcode if you’re preparing for a technical Java interview, as many organizations use Leetcode and similar sites as fodder for questions. If you’re preparing for an interview for an Android developer position, also make sure you know Kotlin in addition to Java, as the former is rapidly becoming a significant element in Android development. On the other hand, while developing your career in this field, focus only on the necessary knowledge.

There are thousands of Java courses available online but not everything is good. There is no doubt that every programmer should know Git and Github as they are the standard in terms of version control and code repository. If you want to learn and master Design Patterns, particularly OOP Design patterns then I suggest you join the Design Patterns in Java course by Dmitri Nestruk on Udemy. This is a great course to learn the modern implementation of classic design patterns in Java. It’s a 3-part course on Computers, Programming, and Mathematics and essential for all kind of programmers including Java developers.

Step 3. Join the Java Community to Learn From Your Peers

I suggest you go through that list, chances are that you already have half of them but if you don’t learn them they are very, very useful and help you to write better Java programs and deliver faster. The goal of Eclipse of MicroProfile is to define standard APIs for building microservices and deliver portable applications across multiple MicroProfile runtimes. The current version of Eclipse Microprofile is 3.2, and it’s a useful Java framework to learn in 2024. After Finishing Core Java Start learning Java EE(Enterprise Edition) which is also known as Advanced Java. When you start learning Java EE you are able to work on web development as Java EE has specifications for additional features like distributed computing and web services.

Although a degree in the relevant discipline is required to secure a job, you don’t need any formal training to be a Java developer. And you can surely excel as a Java programmer without having a degree to back you up. It’s always a good idea to include comments in your code explaining the method and algorithm you employed.

What to Know Before Becoming a Java Developer

If you want to learn more about Computer Science, you can also check out Introduction to Computer Science and Programming Specialization by University of London. The HTTP protocol is the backbone of the web, and a good knowledge of both HTTP and HTTPS is how to become a java developer mandatory for a web developer. At least you should know about how HTTP and HTTPS works and what are different HTTP methods and their purposes etc. This Roadmap contains my years of experience and the unobstructed path of how to become a Java expert.