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And, if you are interested in a more advanced, hands-on course, then Refactoring Java 8 by Dr. Heinz Kabutz is a good one to join. It's almost imperative nowadays for a Java developer to learn Spring framework as most of the companies prefer to do development using Spring frameworks like Spring MVC, Spring Boot, and Spring Cloud for developing a web application, REST APIs Microservices. It also promotes best practices like dependency injection and makes your application more testable, which is a crucial requirement for modern-day software. If you are a new Java developer, then I suggest you to start with this Java and Spring tutorial to learn the basics of this excellent framework, and if you are already familiar with Spring, then you should explore Spring Boot and Spring Cloud for developing next-generation Java application. If you are looking for some references, then Spring Framework 6: Beginner to Guru is the best course to start with.
For a modern Java developer, knowledge of DevOps is essential. He should be at least familiar with continuous integration and continuous deployment and how Jenkins helps to achieve that. It becomes even more important for senior Java developers who often is responsible for setting coding best practices and creating environments, building scripts and guidelines. I also suggest you spend time and learn more about DevOps in general and tools like Docker, Chef, Kubernetes, etc. along with Maven and Jenkins. If you need some resources, then Learn DevOps: CI/CD with Jenkins using Pipelines and Docker in Udemy is probably the best course to start with. You will not only learn about CI and CD but also about Maven and Jenkins in depth. If there is one common thing that separates a good Java developer from an average Java developer, then it's the unit testing skill. A good and professional Java developer almost always writes unit tests for his code, and if he is really a Rockstar developer, you can see that from his code and tests.
Testing has also come a long way now with several tools for unit testing, integration testing, and automation testing available to Java developers. You can spend the right amount of 2024 to hone your testing skills in Java, but for those who are new to the Java world and unit testing, JUnit is the best library to start with. The recent version of JUnit 5 is both powerful and flexible, and every Java developer should know that. If you are looking for a good overview of JUnit and unit testing in Java, then JUnit and Mockito Crash Courses a perfect to start with. It's not the most up-to-date as it doesn't cover JUnit 5 but is still pretty useful for beginners. If you have worked with great Java developers, you might have noticed their overall knowledge of the Java Ecosystem, and APIs form a significant part of it. Java is the world's most popular and mature programming language, and there are tons of libraries and APIs available for doing almost everything possible.
If you know JVM well, you can write both robust and high-performance Java applications, and that's what Rockstar Java developers do. As part of this, you should also learn how to profile your Java application, how to find performance bottlenecks, like which objects are taking most of your memories, and eating CPUs. For structured learning, I recommend Understanding the Java Virtual Machine series on Pluralsight. It's a very comprehensive and hands-on course, perfect for curious Java developers. Btw, you would need a Pluralsight membership to get access to this course, which costs around $29 per month or $299 annually (14% discount). It also includes interactive quizzes, exercises, and the most recent certification material. It's more like Netflix for Software Developers, and Since learning is an important part of our job, Pluralsight membership is a great way to stay ahead of your competition. They also provide a 10-day free trial without any commitment, which is a great way to not just access this course for free but also to check the quality of courses before joining Pluralsight.
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