Java IDE

The online Java IDE for AP Computer Science A and K-12 classrooms

Main.java

public class Main {
    public static void main(String[] args) {
        double length = 14.5;
        double width = 7.5;

        double area = length * width;

        System.out.println("The area is " + area + " square feet");
    }
}

Assignment

Compiling and running Java happens in the full IDE.

Works on any device

Runs in the browser — nothing to install.

Automated grading

Tests run against every submission.

Fully customizable

Edit the lesson, starter code, and tests.

Start Coding Now

Browser-Based Java IDE

JuiceMind's online Java IDE compiles and runs Java in the cloud — students write, compile, and debug without a local JDK. Built for K-12 classrooms, from a first System.out.println() to the classes and arrays AP Computer Science A is examined on.

Instant Java Compilation

Compile and run Java with one click. No JDK download, no classpath, no local setup.

Test Cases & Autograding

Configure unit tests that run against student code and return instant feedback automatically.

Built-in Error Detection

Compiler messages and stack traces point students to the exact line that broke.

Works on Chromebooks & Tablets

Any device with a web browser. Nothing to install, update, or get past IT for.

Built for AP Computer Science A

Classes, arrays, ArrayList and recursion — the constructs the AP CSA exam is written around.

Save, Share & Submit

Student work saves automatically and can be shared with a link or turned in for grading.

Also available for Java

Java Swing AP Computer Science A Intro to Java

Open Java IDE

Why use JuiceMind as a teaching tool?

A complete platform built for K-12 computer science education

LTI Integration

Works with Canvas, Google Classroom, and Schoology.

Web-based

Students complete everything on any web browser.

Group Projects

Students collaborate in real-time with classmates.

Debugger

Step through code line by line to find the problem.

Pre-made Exercises

Ready-to-use exercises and projects you can assign today.

24-Hour Support

Customer support around the clock when a class needs it.

Ready to Start Coding?

Jump into our Java IDE and start writing code in seconds. No signup required to try it out.

Start Coding Now View Curriculum