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!
Gradebook MiniLab
Practice all you've learned with this mini-lab series to create a gradebook.
AP CSA Student Practice
Specifically designed to support AP CSA students practice the skills needed for the exam.
Being a Java Developer
Get inspiration and discover why you might want to be a Java Developer.
Learning Java Has Never Been Easier
Videos to get you started
2026 AP CSA Exam FRQ #1 Account Explained
In this video, we walk through FRQ 1, where students were asked to write a constructor and method for an Account class.
2026 AP CSA Exam FRQ #2 Bottle Class Explained
In this video, we walk through FRQ 2, where students were asked to write the Bottle class.
2026 AP CSA Exam FRQ #3 Attendance Explained
In this video, we walk through FRQ 3, where students were asked to write a method to analyze data in an ArrayList.
2026 APCSA Exam FRQ #4 Game Board Explained
In this video, we walk through FRQ 4, where students were asked to write a method to analyze a 2D Array.