leJOS EV3

leJOS EV3 is an open-source Java platform for the LEGO Mindstorms EV3 brick that lets you build, deploy, and run robot programs in standard Java. It boots from a microSD card, so it does not permanently modify the EV3—remove the card to return to the original firmware. leJOS EV3 includes a lightweight Java virtual machine, an on-brick runtime and menu, and a comprehensive robotics API designed by The leJOS Team.

Key features:

• Java development on Windows, macOS, and Linux, with Eclipse integration and command-line tools for building, uploading, and debugging
• High-level robotics libraries for regulated motors, EV3/NXT and many third-party I2C sensors, display graphics, buttons, sound, and file I/O
• Movement and navigation support, including differential drive control, odometry, path following, and a Behavior/Arbitrator framework for subsumption-style robotics
• Multithreading and event-driven programming for responsive, concurrent robot behavior
• Connectivity via USB, Bluetooth, and Wi‑Fi, with APIs for remote control and PC-to-robot communication
• On-brick program launcher, logging, and diagnostics

Ideal for educators, students, hobbyists, and researchers, leJOS EV3 brings real-world software engineering practices to LEGO robotics, enabling portable, testable, and maintainable Java code on the EV3 platform.

leJOS EV3 is developed by The leJOS Team and is used by 2 users of Software Informer. The most popular versions of this product among our users are: 0.8 beta and 0.9.