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If you are a Java programmer and are wondering what to read to improve your knowledge of Java or become a better Java developer, then you have come to the right place.

In this article, I am going to share some of the best Java books ever written. These books have withstood the test of time, becoming more and more relevant as the years go by.

It doesn't matter if you read them now or plan on reading them later, you will always have a lot to learn and that's why I think they are the greatest Java books of all time.

Personally, I am a big fan of reading books. I have hundreds of books and eBooks in my library. If you don't know, I have also written a java book - Grokking the Java Interview for people who want to crack Java interviews. If you want, you can also buy in Gumroad for just 19.9 using my special discounted link.

When I was young, I read a lot of comics, including Super Commando Dhruv, who was one of my favorite characters because of the scientific theme in his stories and how he usually defeats his more powerful enemies without any superpower and just by using his intelligence, acumen, and simple knowledge of scientific facts.

My passion for books continued when I became a programmer. The first Java book I read, apart from textbooks in college, was Head First Design Pattern. This book completely changed my knowledge of Java and my understanding of object-oriented programming.

Until then, I didn't understand the real use of the interface. To me, they look useless, because you can't write code to do anything there. But, after reading the book, I realized how awesome they are in terms of reducing the coupling between different parts of your program.

From that point, I have read many programming books, mostly related to Java. Today, I am going to share the 10 best Java books that every Java developer should read.

Even if some knowledge is out-dated, most of the stuff you learn will help build upon your knowledge and a lifetime career. Btw, I'll get paid if you buy any of these books or any of my recommended course.

10 Books Every Java Programmer Should Read

Without further ado, here is my list of some of the most popular and important books for Java programmers.

If you have been doing Java programming for 2 to 3 years, then it's a good chance that you have read these books already. But, if you haven't, now is the best time to read them.

I am 100% sure that You will not regret investing your time and money in these books because what you will learn is worth much more than and last for years to come.

1. Effective Java

There should not be any surprise here. Effective Java by Joshua Bloch is hands down the best Java book ever. This is a definite must-read book for Java programmers of any experience level. You will learn so much about Java and its API than you could imagine.

The fact that Joshua Bloch himself is the author of several key Java classes and API, like java.lang and Java Collection framework, is enough reason to read this book. Along with that, his writing style is also fantastic.

You can read this book on a beach, while traveling, or just at your desk. It's awesome. There is no doubt that you would emerge as a better Java programmer after reading this book.

And the best thing is that a new edition of Effective Java is available now, which covers Java 7, 8, and 9. There cannot be a better time to read this book.

2. Clean Code

Another timeless classic for Java programmers is Clean Code. As the title suggests, it teaches you to write better code, which is such a difficult thing to learn.

To be honest, it's easy to learn Java, but difficult to write better Java code that uses strong OOP principles and that's where this book helps.

Similar to Joshua Bloch, Robert C. Martin, also known as Uncle Bob, is an excellent author and shares a lot of his experience as a software developer, teaching you various programming techniques and practices that help a lot in your day-to-day job as a programmer.

If you follow Clean Code, there is also a course on Pluralsight called Clean Code: Writing Code for Humans By Cory House which effectively complements this book.

Btw, you would need a Pluralsight membership to get access to this course, which costs around $29 per month or $299 annually (14% discount).

If you don't have Pluralsight membership, I encourage you to get one because it allows you to access their 5000+ online courses on all the latest topics like front-end and back-end development, machine learning, etc.

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.

3. Java Concurrency in Practice

Multithreading and concurrency is an essential part of Java programming. There is a no better book than Brian Goetz's Java Concurrency in Practice to learn and master this tricky topic.

Even though the book only covers Java 5, it's still a relevant and must-read book for any serious Java developer.

Some of you may find that some of the sections are a bit difficult to understand, especially sections 3.5.1 through 3.5.6, And if that's the case, I suggest you go through the Extreme Java --- Concurrency Performance course by Dr. Heinz Kabutz. This will help you to better digest and comprehend those topics.

4. Head First Design Patterns

Good knowledge of OOP and design patterns are important for writing any Java application. Head First Design Patterns is the best book for learning to do that.

As I have said before, this was one of the first books I ever read on Java, apart from textbooks. After reading this book, I was very impressed.

This is the book that taught me why Composition is better than Inheritance and how you can change the runtime behavior of a class without touching the already tried and tested code.

You might think that it's just another old book, but you don't need to worry, an updated copy that covers Java SE 8 was released a couple of years ago.

If you are serious about learning design patterns in Java, this is the book you should read!

The Design Pattern in Java course on Udemy is also a nice resource to get yourself familiar with the modern implementation of essential design patterns in Java and object-oriented programming. You can follow that course along with this book to get the best of both worlds.

5. Spring in Action

Sorry, but I have to include one Spring book, Spring in Action, in this list of classic books for Java programmers. Spring is the most popular Java framework ever and this is the best book to learn about the Spring framework, but --- to be honest --- this book is much more than a Spring book.

After reading the 5th Edition of this book, I realized so much about Java and writing better code that I can't begin to explain.

The books take a topic, like JDBC, and explain where JDK went wrong and how Spring corrects that mistake, e.g. SQLException, a one-size-fits-all exception that says something is wrong but not exactly what is wrong or how to deal with that.

Like Josuha Bloch and Uncle Bob, Craig Walls is another great author and you will learn much more than just Spring by reading this book.

The great news is that now the 5th Edition of Spring in Action is also available, one of the books in my reading list.

Btw, if your goal is to learn Spring, I also suggest you join a great online course like Spring Framework 5: Beginner to Guru along with this book. You will learn quickly and better than many developers, who try to learn by yourself.

6. Test Driven

Automation testing is an important skill. For developers, it all starts with unit testing. Java has been blessed to have the JUnit from the start, but just knowing the library doesn't make you a professional programmer who can write tests.

It takes much more than knowing a unit testing library, like JUnit or Mockito, and that's where this book helps. If you are serious about code quality and writing unit, integration, and automation test, Test Driven is the book to read for serious java developer.

If we talk about libraries, JUnit and Mockito are must for any Java developers. If you are not familiar with them, I suggest you go through this JUnit and Mockito Crash Course along with the above book to master the art of unit testing in Java.

7. The Definitive Guide to Java Performance

Another aspect of becoming a better Java developer is knowing about JVM, Garbage collection, and performance tuning.

Though there have been several good books on this topic, like Java Performance by Binu John and Charlie Hunt, The Definitive Guide of Java Performance by Scott Oaks is my favorite.

Even though it only covers until JDK 7, you will learn a lot about performance tuning and JVM in general, which totally justifies the time and money you will spend on this book.

8. Head First Java

How many of you started learning Java by reading this book? Well, I did. Just after I came to know about Head First Design Pattern, I also found this book, Head First Java, and I really enjoyed reading it. I learned a lot of Java concepts and many of my misconceptions were also corrected.

Though many feel this is an out-of-date book, I still feel it's a great book for anyone just starting with Java because of its unique style and content.

You can easily learn about Java 8, Java 9, and Java 10 changes on other versions once you know Java by reading this book.

Btw, If you like online courses and looking for some of the best Java courses to start your journey then The Java MasterClass on Udemy is simply the most up-to-date and the best course to start with.

9. Head First Object-Oriented Analysis and Design

Here is another "Head First" book in the list of the greatest Java books. Yup, they are simply awesome.

Head First Object-Oriented Analysis and Design form a trilogy of the "Head First" books for Java programmers, i.e. Head First Java, Head First Design Patterns, and Head First OOAD.

It actually complements Head First Design Patterns by explaining the techniques of object-oriented programming and design.

The most important technique that I learned from this book was coding for interfaces and how to encapsulate what changes. This book simply changed how I write Java code.

If you like courses, *SOLID Principles: Introducing Software Architecture & Design * by Sujith George on Udemy is great and you can follow that along with this book for a better understanding of object-oriented design principles.

10. Java: A Beginner's Guide

If you ever need a comprehensive Java book, this should be it. Even though the title says Java: A Beginner's Guide, it's one of the most complete books for learning Java.

Sir Herbert Schildt has also done a commendable job in keeping the book up-to-date, like the 7th Edition of this book now covers Java 9.

Though, I don't know how he is going to keep this book up-to-date going forward, since Java's new 6-month release cycle which started with Java 10.

Btw, they have released a supplement to cover JDK 10 new features. I think that would be the way going forward.

There you go! These are some of the best books for Java programmers. If you are a passionate Java programmer, there is a good chance that you have already read most of these books.

But, if you haven't, then this year may be just the right time to read these books. They are absolutely awesome. You can choose the latest version of the book wherever possible, e.g. Effective Java 3rd Edition or the 7th Edition of Java: A Beginner's Guide.

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Closing Notes

Thanks, You made it to the end of the article ... Good luck with your Java Programming adventure. It's certainly not going to be easy, but by going through these books, you will get some useful experience.

If you like this article, then please share it with your friends and colleagues, and don't forget to follow javinpaul on Twitter!

P.S. --- If you like online courses and looking for some of the best Java courses to start your journey then The Java MasterClass on Udemy is the best course to start with.