I have successfully install the JRE for java8 on EV3 with windows7
. The procedure requires an extra step to generate the environment file using jrecreate and rebuilding the file expected by the leJOS installer. For those interested here is the detailled procedure (lenghty but easy)
The following procedure will install the java 8 environment compatible with leJOS 9.0 from windows 7. The only extra tool needed is 7ZIP (a free tool) which can generate tar and gz format.
In the following I use a temporary directoyr as F:\temp. Replace it with your own temp directory wherever it appears
1-Go to java site http://www.oracle.com/technetwork/java/ ... 82511.html
2-Create an account if you dont have one then Accept Licensee agreement and download
ejdk-8-fcs-b132-linux-arm-sflt-03_mar_2014.tar.gz or the latest java8 jre for EV3
3-Unzip this file in your F:\temp directory. For simpler process you may rename the extracted directory (ejdk-8-fcs-b132-linux-arm-sflt-03_mar_2014.tar.gz) as ejdk8
4-Go to directory ejdk8\ejdk1.8.0\bin. Save the file jrecreate.bat. Now right click on jrecreate.bat and select "modify".
Add one first line to the bat file as
this is where java8 is installed on my system. Program~2 stand for Program Files (x86) butis easier to type
5- Start a command window: Start->All prog->Accessory->commands
6- In this window type in the following commands
jrecreate.bat --dest newjre --profile compact2 --vm client
It should start creating the new jre files in the directory "newjre" under ejdk8\ejdk1.8.0\bin
wait for the final message.
Close the command windows
7-With file explorer go to F:\temp\ejdk8\ejdk1.8.0\bin. Copy "newjre" directory back to F:temp
8-Rename the "newjre" directory as something expected by LeJOS such as
9-Right click on it. Open with 7ZIP and add to archive. Select tar format. It will create ejre-8-b132-linux-arm-sflt.tar file
10-Right click on tar copy then add archive with gzip format. It will create ejre-8-b132-linux-arm-sflt.tar.gz
you have created the JRE file for java8 expected by EV3
11-Insert your SD card and format it in FAT16 type.
12-Copy the ejre-8-b132-linux-arm-sflt.tar.gz under the sd card top directory
13-Go to C:\Program Files\leJOS EV3 <here leJOS is installed. Open lejosimage.zip with 7ZIP and extract all files in the SD card top directory.
14-Now remove the SD from PV and insert the card into the EV3 brick then power it. Wait for the end of the install (about 10mn)
If anything goes wrong, format again the SD, empty the F:\temp directory and restart at step 3.
if it persist try another sd card