Which book do you recommend to learn Java concepts and practices deeply ? More on forum.exercism.org

Effective Java is the best, IMHO. Be sure is the last edition. More on reddit.com

Please ensure that: Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions You include any and all error messages in full - best also formatted as code block You ask clear questions You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions. If any of the above points is not met, your post can and will be removed without further warning. Code is to be formatted as code block (old reddit/markdown editor: empty line before the code, each code line indented by 4 spaces, new reddit: https://i.imgur.com/EJ7tqek.png ) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc. Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit. Code blocks look like this: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } } You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above. If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures. To potential helpers Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice. I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com

Effective Java by Joshua Bloch Java Concurrency in Practice by Brian Goetz (very valuable concurrency knowledge even if it precedes the newer concurrency changes in Java) Core Java: Fundamentals, Volume 1, 12th edition by Cay S. Horstmann (Covers features up to Java 17) The Pragmatic Programmer by Andy Hunt and Dave Thomas Spring in Action by Craig Walls Refactoring by Martin Fowler, with Kent Beck A Philosophy of Software Design by John Ousterhout Design patterns by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides Difficult Conversations by Douglas Stone, Bruce Patton, and Sheila Heen (More of a lifestyle kind of thing, but good for talking to colleagues and bosses) Database Design and Relational Theory by Chris Date (Because solid RDBMS knowledge is fantastic) I'd drop Clean Code completely tbh. I find a lot of the refactored examples poor examples of good code, and I don't think it provides any much value as a "take it with a grain of salt" book as many suggest these days. In my opinion it is far better to take Effective Java, Core Java, Refactoring, and Design patterns as a guide to writing better quality code. More on reddit.com