Java Learning Platforms Compared: Codecademy, Sololearn & More

Before you decide, answer these questions for yourself:

• Learning style: Do you prefer watching videos, reading short lessons, or writing your own code from day one?
• Feedback: Do you get feedback on your own code, for example through automated tests?
• Setup: Does everything run in the browser, or do you have to install a JDK and an IDE?
• Device: Do you learn at a computer, or mostly on your phone?
• Goal: Do you want to learn programming in general, prepare for a job, or pass a specific exam or course?
• Payment model: One-off purchase, monthly subscription or annual plan? How do you cancel?

No platform is the right choice on all of these points. It depends on what matters to you.

Codecademy

Codecademy offers interactive courses that you work through in the browser. For Java there is, among others, the "Learn Java" course with lessons, projects and quizzes, plus free introductory content.

Strengths:

• A very polished learning environment with many programming languages besides Java.
• An AI learning assistant that, according to the provider, helps you solve tasks and explains errors.
• Certificates, career paths and technical interview prep in the higher plans.

Good to know:

• There is a free Basic plan with a limited choice of courses. According to the course pages, projects, quizzes and certificates belong to the paid Plus or Pro plans, which may come with a free trial. Check whether a trial needs card details and when it turns into a paid plan.

Sololearn

Sololearn focuses on short lessons and small exercises and is designed mainly for smartphones. There are apps for iOS and Android, and you can also open the courses in the browser.

Strengths:

• Learning in small bites, good for breaks and on the go.
• A worldwide community that, according to the provider, supports you while learning.
• Many languages besides Java.

Good to know:

• Getting started is free. For the full feature set, Sololearn asks for a Pro subscription, according to its app store description, which starts with a free trial.
• According to the description, if the trial isn't cancelled in the App Store at least 24 hours before it ends, it renews automatically as a paid subscription. Put the date in your calendar if you only want to try it.

Hyperskill (JetBrains Academy)

Hyperskill belongs to JetBrains, the company behind IntelliJ IDEA. The platform is project-based: you learn theory in small topics and build real projects along the way. For Java there is, for example, an introductory track and a backend developer track with Spring Boot.

Strengths:

• Close to everyday work as a developer. You work on projects instead of only on single exercises.
• You can solve tasks and projects right in the JetBrains IDE via a plugin, so you get to know a professional tool at the same time.
• According to the provider, the paid plan adds more hints, an AI assistant and certificates. Check the current plan details on their site.

Good to know:

• For project work in the IDE, you install software on your computer. On a work laptop without admin rights that can be difficult.
• Free use is limited. The exact limits are listed by the provider.

Udemy

Udemy is a marketplace for video courses. The courses come from individual instructors, and you usually buy each course separately.

Strengths:

• A huge choice, including Java courses in many languages.
• Often very thorough courses with many hours of video that you watch at your own pace.
• According to Udemy's help pages, you keep access to purchased courses as long as your account is in good standing and Udemy holds the licence for the course.
• According to Udemy, eligible individual course purchases can be refunded within 30 days, with restrictions. This does not apply to its subscription plans.

Good to know:

• Quality depends on the individual course. Look at the reviews, the date of the last update and the Java version used.
• In many courses you work locally with a JDK and an IDE. Feedback on your own code is not a standard part of a video course.

Jario

Jario is our offering. It's built for Java in exams, courses, apprenticeships and university, and it's available in English, German and Polish.

What you get:

• An editor in the browser with syntax highlighting, error marking, formatting and autocomplete. No JDK, no IDE, no admin rights needed.
• Tasks with tests: "Check" shows you, for example, "3 of 4 tests passed". Plus output tasks of the "What does the program print?" kind.
• An AI tutor that knows the task, your code and the test result. It gives hints in small steps and deliberately doesn't reveal the solution.
• Courses: Java basics in 12 chapters, Algorithms in Java in 8 chapters, plus CNC basics.
• The first 2 tasks without an account. With a free account, the tasks of the first 2 chapters, no payment details needed. Pro costs €9 a month, you can cancel monthly in your account and there's no minimum term.

Good to know:

• Jario specialises in Java, plus G-code in the CNC course. Other programming languages such as Python aren't available.
• There are no certificates, no app and no video courses.
• Jario is meant for practising with tasks. For your own projects outside the tasks, you'll use an IDE later on.

• You want to try several languages and like interactive lessons in the browser: Codecademy.
• You mostly learn on your phone, in short breaks: Sololearn.
• You want to learn through projects, close to real work, in a real IDE: Hyperskill.
• You like learning with long videos and want to pay once per course: Udemy.
• You have a Java exam, a CS1 course or an apprenticeship assessment coming up and want to write code yourself, with tests and hints instead of finished solutions: Jario.

Whatever you choose, start with the basics: input and output, conditions and loops. If a platform doesn't make you write code yourself at this stage, add one that does. Which topics come next is shown in our post on the right order for learning Java.

Not every learning aid is a platform. Many people learn with YouTube, a textbook or a chatbot. How to use ChatGPT so that you still learn something yourself is in Learning Java with ChatGPT without ending up unable to code. And if you're wondering whether a tutor would be the better choice, our overview Java tutoring: what it costs and what the alternatives are will help.

Try before you pay. Almost every provider has a free way in. With trials, check whether and when they turn into a subscription, and read the cancellation terms. All information in this post is as of October 2026. Check the current terms with the provider before you decide. With Jario you can solve the first tasks without an account, right in your browser, and see for yourself whether this way of practising suits you.