Tech enthusiasts from all over the world often wonder how they can become better Java developers. Given the New Year on the corner, I have decided to list a few important tips to become a good Java developer to boost one’s Java programming knowledge and increase their value for future career growth.
So without losing any more time, let’s check these ideas for Java programmers in 2021 as listed below. You can take inspiration from these thoughts to create your very own goals.
How to Become a Good Java Developer
Here, in this section, we are going to uphold a few important tips which will help you to become a good Java developer. Let’s have a glance:
1. Learn Java Performance Tuning
According to an opinion poll by some of the senior java developers, one factor that can be easily seen is that there is a significant lack of knowledge and understanding about JVM internals, Java performance tuning, and GC behavior.
As your Java expertise expands and you become a senior Java developer with more than five to six years of experience, you are expected to know the big picture as well as the small details about Java’s fundamentals.
If you can’t shape an application or can’t crack the reason behind its slowness or don’t know how to make it work faster, then you must study a useful book about JVM internals and performance tuning.
If your preference is online courses rather than books, then I would suggest you take a look at the courses on Understanding the Java Virtual Machine, which explains class loading, memory management, Reflection, and Security.
2. Learn Java 11 Prior to Java 13
A couple of big releases have been seen in the last few years, and one of them was JDK 13. But if you have not yet started with JDK 11, then you must first learn that and forget jumping into 13. Otherwise, this is the first thing you should look into in 2021.
Note:- Java SE 12 has reached the end of support. Users of Java SE 12 should switch to Java SE 13.
If you want to learn new Java 11 features, for example, Reactive Streams or Jigsaw and API enhancements, then starting with Java 11 MasterClass course will be a good option.
Similarly, you should look for a good course on Java 13 to better understand Java 13 features like var for local variables. The Complete Java MasterClass is the one that is the latest and also recently updated for Java 13.
3. Spring 5.0
Spring Framework 5.0 was another major phenomenon in the Java programming world which was released in 2017. With lots of thrilling features such as reactive programming model and Java 8. Spring 5.0’s acceptance is going to accelerate, and therefore every Java developer should learn it.
4. Unit Testing
If becoming a better developer is what you are up to in 2020, then, you should focus on your unit testing skills. And not only unit testing but general automated testing. This also involves integration testing.
You can become skilled at JUnit 5 and other advanced unit testing libraries like PowerMock, Mockito, and Robot Framework to take forward your unit testing skill to the next level.
Mockito is truly robust and lets you write a unit test for complex classes by mocking dependencies and just concentrating on the objects under test.
If you are a newbie in unit testing and want to master the skill, then the JUnit and Mockito Crash Course from Udemy is a good starting point.
5. Learn the JVM’s Internals
If you are thinking about turning into a Java rockstar developer, then you need to spend time learning JVM internals such as what are the different JVM parts, how they work, JVM options, JIT, Garbage collection and collectors, etc.
When you are well acquainted with the JVM, you can write Java applications that are powerful and high-performance, and that is what rockstar Java developers do.
As an integral part of this, you should also learn the tricks of profiling your Java application and how to search for bottlenecks of your performance.
If you want to learn in a planned way, I would highly recommend a great book by Scott Oaks, The Definitive Guide to Java Performance.
That’s all I have in my kitty! If you are a Java programmer with too little experience, you can easily be motivated by this list and set your own target. A few other kinds of stuff that you can add to this list are learning Android, Spark, DevOp tools, and Kotlin as these are essential for any Java programmer.
I have kept this simple and achievable intentionally because it is my personal belief that small achievements lead to great success. Setting and achieving small goals is far better than setting big, impractical goals and pre-kick-off failures. So go and follow these important tips to become a good Java developer.