Join the Java 27 Launch!
Join us on September 15th for a special three-hour livestream as we celebrate the release of Java 27. Expect live coding, technical deep dives, and conversations with special guests from the JDK team and community.
The Destination for Beginners, Students, and Teachers of Java
Why Java?
Learner's Corner
Teacher's Corner
Try out Modern Java Now
The Java Playground allows you to run snippets of program code to see the results. The way the Java Playground works, no class or main method is required. Just hit run below!
Recently Updated
Been here before? Looking for something new to learn? Try these!
Educator Briefings
An educator briefing on new features from Java 8 - 25 that should be consider in Intro to CS.
Declaring Variables Practice
Practice declaring variables based on descriptions
Adopt-A-Pet
Apply what you've learned about variables, expressions, and assignments to create a virtual pet
Learning Java Has Never Been Easier
Videos to get you started
Java Primitive Data Types Explained (int, double, boolean, and char)
This video introduces primitive data types—the built-in types used to store simple values like numbers, characters, and true/false.
Intro to Reference Data Types: The Next Big Step
Take the next step beyond primitives by learning about reference data in Java.
Java Variable Names: Rules, Conventions, and Best Practices
This video covers the official rules Java enforces (what characters you can use, where names can start, and which words are reserved) plus common naming conventions like camelCase.
Java Arithmetic Operators: +, -, *, /, and % Explained
Discover how to use operators such as addition (+), subtraction (-), multiplication (*), division (/), and remainder(%) to work with numeric values.
