About leJOS

lejosLogoleJOS brings the Java® language to LEGO® MINDSTORMS®. It offers a powerful programming environment for the MINDSTORMS® RCX, NXT and EV3 bricks.

LEGO® and MINDSTORMS® are trademarks of the LEGO Group of companies which does not sponsor, authorize or endorse this site.
Oracle and Java are registered trademarks of Oracle and/or its affiliates.



4 thoughts on “About leJOS

  1. Hi,
    I would like to ask just one question, becuase I want to develope LEGO Mindstorms EV3 with leJOS.
    If I install the leJOS from my micro SD card, which is in the Brick, the Brick will lose its original firmware (or OS ) ? So, If I want to use my Brick without micro SD card, It will launch with the original firmware or write an error message ? Because I would not like to lose the original firmware.
    Please inform me about it as soon as possible.

    Best wishes,

    Posted by Tibor Tóth | 2015/12/07, 10:40
  2. Hi there, I’m a Lejos/java newbie, and if you have some time, I’d like to ask you a few questions. I’m trying to make a lego pen plotter, with an x,y, and z axis. the print carriage moves the print head in the y axis, and also moves the print carriage in the x axis. The print head goes up and down on the z axis, lowering and retracting the pen so it can draw. What kind of classes would I need to use/ what steps would I need to take to make the ev3 brick take a png image, analyze the points, and draw the image with the plotter? A project similar to mine is Bricasso. (http://jkbrickworks.com/lego-mosaic-printer/) Any insight is greatly appreciated.

    Posted by Trent | 2016/05/15, 19:55

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