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.
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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!
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AP CSA 30-Week Lecture Series
A 30 week lectures series to prepare for the AP CSA exam.
Topics 1.1 to 1.4
Intro to algorithms and programming, including variables, expressions, assignment, input and output.
Topics 1.5 to 1.6
Learn about the range of variable and how to use casting to change the type of a value. We will also explore using compound assignment operators.
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.