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Get annual Premium subscription for $149
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What do you get with a Premium subscription? Premium subscription
  • Access to all CodeGym quests
    CodeGym offers several quests: Java Syntax, Java Core, Java Collections, and Multithreading. It is a well-structured course covering all key aspects of Java. You'll find more than 500 mini-lessons and 1200 practical tasks.
  • IntelliJ IDEA plugin
    We teach students to code in IntelliJ IDEA, one of the most convenient and popular IDEs for Java. To make life easier for you, we wrote a CodeGym plugin for IntelliJ IDEA. It lets you get a task in two clicks, and submit it for verification in one!
  • Task requirements
    What's wrong this time? Where's my mistake? Why doesn't my solution work correctly? Get answers to these questions from status indications for each task requirement. After submitting your solution for verification, you'll see which task requirements you have fulfilled and which you have not.
  • Task recommendations
    Task recommendations are based on an analysis of tens of thousands of errors made by previous CodeGym students. When our system recognizes an error, you'll automatically receive a recommendation from the programmer whose wrote the task. It's almost like working with a personal mentor.
  • Instant task verification
    In ordinary full-time courses, the teacher is inundated with a huge number of student programs. He or she is physically incapable of carefully and quickly checking everything. Students have to wait a long time! CodeGym has no such problem: our validator checks your solution instantly. Click a button, and in a couple of seconds you'll know whether your solution is correct. If you made a mistake, you'll get a list of requirements and recommendations on what exactly needs to be fixed.
  • Mini-projects
    It's difficult for beginners to write large programs, since they don't know how to approach them. That's why we invented mini-projects consisting of 15-20 subtasks. Each subtask has detailed instructions on what to do. This lets you gain experience developing relatively complex applications. For example, you will write simple games, an online chat system, a restaurant automation system, and much more.
  • Bonus tasks
    Tasks for future programming rock stars! They are more difficult than ordinary tasks and require much more time and effort, even if you're cruising through your studies. Bonus tasks are devoted to algorithms, patterns, and other topics that many people find difficult.
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Get more features with a Premium Pro subscription Premium Pro subscription
  • ReCheck
    You completed the task, submitted it for verification, and received confirmation that your solution is correct. But that's not enough for you — You want to try to solve it in a different way! For programmers with such inquiring minds, we added the ability to check multiple solutions for three days after the first correct solution is submitted.
  • Style check
    As a developer, you’ll need to write code that other programmers can understand. It means that you should follow a style guide, which outlines requirements for writing code. CodeGym has a "code style analyzer" that checks whether your code follows the standards and gives you a list of comments on your code.
  • IntelliJ IDEA plugin
    We teach students to code in IntelliJ IDEA, one of the most convenient and popular IDEs for Java. To make life easier for you, we wrote a CodeGym plugin for IntelliJ IDEA. It lets you get a task in two clicks, and submit it for verification in one!
  • Task requirements
    What's wrong this time? Where's my mistake? Why doesn't my solution work correctly? Get answers to these questions from status indications for each task requirement. After submitting your solution for verification, you'll see which task requirements you have fulfilled and which you have not.
  • Task recommendations
    Task recommendations are based on an analysis of tens of thousands of errors made by previous CodeGym students. When our system recognizes an error, you'll automatically receive a recommendation from the programmer whose wrote the task. It's almost like working with a personal mentor.
  • Instant task verification
    In ordinary full-time courses, the teacher is inundated with a huge number of student programs. He or she is physically incapable of carefully and quickly checking everything. Students have to wait a long time! CodeGym has no such problem: our validator checks your solution instantly. Click a button, and in a couple of seconds you'll know whether your solution is correct. If you made a mistake, you'll get a list of requirements and recommendations on what exactly needs to be fixed.
  • Mini-projects
    It's difficult for beginners to write large programs, since they don't know how to approach them. That's why we invented mini-projects consisting of 15-20 subtasks. Each subtask has detailed instructions on what to do. This lets you gain experience developing relatively complex applications. For example, you will write simple games, an online chat system, a restaurant automation system, and much more.
Get annual Premium Pro subscription for $249
Comments (1511)
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Karthik Rao K S Level 18, Mangalore, India
1 August 2018
I have visited numerous websites and applications that claim to teach Java in the best way possible. But Code Gym stands out of all those websites; because it does what it claims to do. The simplest to the most complex of topics of Java are explained in layman terms so that anyone irrespective of their educational background can learn, practice, and master Java. A major thumbs up to you, Code Gym!
hidden #10447638 Level 22
30 July 2019
Just this morning I posted in another part that I would not be able to pay for the course. I've been around for 12 levels and I've definitely loved it. There is a saying that I've tried to stick to ever since I saw it: "empty your pockets to fill your mind, for once there will come a time where your mind will fill your pockets" I've got the money from a very close person and plan to take full advantage of the course. Happy coding, everyone!
Akash gupta Level 1, Sri Dungargarh, India
25 April 2019 

System.out.println("Awesome mehtod of teaching programming. I really appreciate it.");
Tara Edwards Level 6, United States
26 July 2019
I'm reluctantly transitioning from manual testing to test automation. I've started a lot of java courses online and this is the first time I feel like I might actually be "getting it"!
Tangerin Level 27, Chongqing, China
7 July 2019
Absolutely love this website and its tutorial! I used to have a C class in university, but the professor is too dull and boring to pay attention to, I just skipped the whole course. But I passed the exam cuz I practice a lot, so I know that in programming, practice matter. And when I want to learn Java and found here...jeez, 80% practice, that's what makes you success, couldn't agree more.
Anonymous #1049 Level 0
27 July 2018
Not surfed much through the website. Currently on Lesson 6 of Java Syntax. Loved the platform till now. Exactly what beginners look for. Everything is explained in the simplest form possible with a fun way. Enjoying to learn from here. A great initiative. Looking forward to learn much more from here. Thanks Team CodeGym
Kumar Vishal Level 6, India
1 August 2018
Something new... The story based approach is what i like the most and at each step there are exercises after a brief lesson which makes it more intriguing. Thanks a lot for such a step.
Molchyn Level 25, Yahil'nytsya, Ukraine
31 July 2019
Thank you for this course, thank you for the work you have done. Since the theory, enshrined in a large practice, is a big plus of this course. Good luck to all. P.S. We are waiting for additions to the course
Prasanthi Level 3, Chennai, India
22 October 2018
This is really helpful. It is so different from Udemy lessons. All the task actually make me think a lot.....
nitesh Level 3
2 August 2018
awesome way of teaching
Michael Coleman Level 8, South Carolina, United States
3 June 2019
I never thought coding was possible for me, but, so far, this program has been easy to understand and use. My only request would be to be able to see the best possible solution after getting a solution right, given that there are multiple ways to solve each task.
MaGaby2280 Level 41, Guatemala City, Guatemala
24 August 2020
CodeGym for me is one of the best learning platforms for Java and specially for new programmer, like myself. I have tried other courses and almost made me quit learning. The theory you learn on book help, but the practice you earn by doing CodeGym is the best. Definitly is a gym for the brain. And when you start learning something practice is what you need! Definitely worth the money!!! My only suggestion would be in the multithreading part, the exercises and conditions might explianed better or more clearly.
Raj Mishra Level 14, India, India PREMIUM
26 August 2021
Codegym is one of the best platforms to learn and practice core java. But it would be better if codegym can work on other related technologies like docker, kubernetes, kafka, microservices, javascript, react, angular, mongDb, Oracle sql/plsql. So that a person will not search for any other platforms for learning full stack java develpment.
Sumit Ranjan Level 9, Samastipur, India
1 August 2018
Loved it!
Azja Level 32, Krakow, Poland
1 August 2019
I was here for long and can say that it not only learn me how to Java but strongly increase my programming, learning, and searching information skills, my life changed and now I pay my debt to CodeGym because it will return to me in future few, or over a dozen, or even more times to pocket! Thanks, and love you so much!
Mansoor Mujawar Level 23, El Paso, United States
30 November 2019
When its come to java, I really regret that why I have not encountered with code gym before. Code gym is based on mantra of education should not be boring with 80% Practical hands on tasks and 20% only required theoretical knowledge, also having in between motivational lectures and videos makes learning fun and easy. If you’re learning java and you encounter code gym then you’re search ends because you’re future in safe hand. All the best!!!
hidden #10566897 Level 6
9 December 2019
WELL DONE! Thank you!🤗
Ahmad Essam Level 18, Cairo, Egypt
29 August 2020
I love you more than my girlfriend xD <3
James Cooper Level 9, Naperville, United States
19 June 2019
Trying to brush up on some coding skills. Seems like a fun way to do it.
Sabin Level 6, Mumbai, India
4 September 2019
I have picked up Java courses on multiple platforms, but nowhere have I been able to keep myself progressing through the course engrossed the way I am on Codegym, so the pattern is what I liked, hands on rather than long theories, that just keeps me ticking to progress
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