LeJOS Installation

  1. Create a Directory on c and call it „ev3JavaLeJOS“
  2. Enter ev3JavaLeJOS and Create a SubDir with the Name „install“
  3. Enter install and create a Directory with the name „LeJOS“, download the following file (https://sourceforge.net/projects/ev3.lejos.p/files/0.9.1-beta/leJOS_EV3_0.9.1-beta_win32_setup.exe/download) and save it in LEJOS
  4. Enter Install and create a Directory with the name „eclipse“, download the following file ( https://www.eclipse.org/downloads/download.php?file=/technology/epp/downloads/release/2018-12/R/eclipse-jee-2018-12-R-win32-x86_64.zip) and save it in eclipse
  5. Enter Install and create a Directory with the name javaJDK, download the following file (. https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html ) and save it in javaJDK. Download from the section „Java SE Development Kit 8u201“. Download the Windows x64 Version.
  6. Enter and create a Directory with the name „JavaEmbeddedEV3“, download the following file ( https://www.oracle.com/technetwork/java/embedded/downloads/javase/javaseemeddedev3-1982511.html  ) and save it in the JavaEmbeddedEV3 Directory.
    Please make sure that step 1 to 6 is finished until we meet online
  7. The whole install process starts now with the next topic
  8. Install the Java Development Kit from Step 5
  9. Install the Eclipse Environment from Step 4
  10. Making a test with a Hello World Sample. Looking, that the compiler is working correctly
  11. Install Lejos from Step 3 (  https://sourceforge.net/p/lejos/wiki/Windows%20Installation/ )
  12. Restart Eclipse and Configure lejos 
  13. Create a Java for Lejos Project , Checking the libs
  14. Checking the path-Settings in Windows
  15. Creating the CD-Card:
    For running Java Programms on the EV3, you have to prepare a SD-Card. It is necessary that the size of the DS Card is exactly the same as in the following manual. Please read the manual. The important part is this: „You will need a blank SD card of at least 2GB and no more than 32GB. SDXC cards are not supported by the EV3 hardware. If you are reusing one from a previous version of leJOS EV3, you must delete all the files from it. The SD card must be formatted as FAT32, must be empty, and must have at least 400MB of free space.“
  16. Time for a coffee 😉
  17. Insert the Card into the EV3
  18. Switch off, wait (and hope! 😉 ) that all things happens correctly 
  19. Connecting the EV3 via BT with the Computer
  20. Testing the Connection with the LEJOS Control -Panel
  21. Testing a small Java Programm for Lejos
  22. Starting the Lesson 🙂