Comments (14)
jabrena
commented on June 3, 2024
$ sudo update-alternatives --config javac
$ sudo update-alternatives --config java
from ev3dev-lang-java.
jabrena
commented on June 3, 2024
http://www.rpiblog.com/2014/03/installing-oracle-jdk-8-on-raspberry-pi.html
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jabrena
commented on June 3, 2024
sudo apt-get install oracle-java8-jdk
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get install oracle-java8-installer
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jabrena
commented on June 3, 2024
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jabrena
commented on June 3, 2024
http://www.webupd8.org/2014/03/how-to-install-oracle-java-8-in-debian.html
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jabrena
commented on June 3, 2024
apt-get install software-properties-common
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jabrena
commented on June 3, 2024
https://packages.debian.org/stable/allpackages
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jabrena
commented on June 3, 2024
With PiStorm, it is possible to install Oracle Java 8 JDK
http://www.webupd8.org/2014/03/how-to-install-oracle-java-8-in-debian.html
root@ev3dev:/home/robot# java -version
java version "1.8.0_71"
Java(TM) SE Runtime Environment (build 1.8.0_71-b15)
Java HotSpot(TM) Client VM (build 25.71-b15, mixed mode)from ev3dev-lang-java.
jabrena
commented on June 3, 2024
But with EV3, it is not possible:
W: Failed to fetch http://ppa.launchpad.net/webupd8team/java/ubuntu/dists/trusty/InRelease
Unable to find expected entry 'main/binary-armel/Packages' in Release file
(Wrong sources.list entry or malformed file)
E: Some index files failed to download. They have been ignored, or old ones used instead.from ev3dev-lang-java.
jabrena
commented on June 3, 2024
Download:
http://www.oracle.com/technetwork/java/embedded/downloads/javase/javaseemeddedev3-1982511.html
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jabrena
commented on June 3, 2024
http://www.rpiblog.com/2014/03/installing-oracle-jdk-8-on-raspberry-pi.html
$ sudo tar zxvf ejdk-8-fcs-b132-linux-arm-sflt-03_mar_2014.gz -C /opt
Set default java and javac to the new installed jdk8.
$ sudo update-alternatives --install /usr/bin/javac javac /opt/ejdk1.8.0/bin/javac 1
$ sudo update-alternatives --install /usr/bin/java java /opt/ejdk1.8.0/linux_arm_sflt/jre/bin/java 1
$ sudo update-alternatives --config javac
$ sudo update-alternatives --config java
After all, verify with the commands with -verion option.
$ java -version
$ javac -versionfrom ev3dev-lang-java.
jabrena
commented on June 3, 2024
Before:
root@ev3dev:~# java -version
java version "1.7.0_75"
OpenJDK Runtime Environment (IcedTea 2.5.4) (7u75-2.5.4-2)
OpenJDK Zero VM (build 24.75-b04, mixed mode)from ev3dev-lang-java.
jabrena
commented on June 3, 2024
root@ev3dev:/opt/ejdk1.8.0/bin# sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-7-openjdk-armel/jre/bin/java 1063 auto mode
1 /opt/ejdk1.8.0/linux_arm_sflt/jre/bin/java 1 manual mode
2 /usr/lib/jvm/java-7-openjdk-armel/jre/bin/java 1063 manual mode
Press enter to keep the current choice[*], or type selection number: 1
update-alternatives: using /opt/ejdk1.8.0/linux_arm_sflt/jre/bin/java to provide /usr/bin/java (java) in manual mode
root@ev3dev:/opt/ejdk1.8.0/bin# java -version
java version "1.8.0"
Java(TM) SE Embedded Runtime Environment (build 1.8.0-b132, headless)
Java HotSpot(TM) Embedded Client VM (build 25.0-b70, mixed mode)
from ev3dev-lang-java.
jabrena
commented on June 3, 2024
Java 8 for EV3 Brick is not possible to compile, only run the software.
from ev3dev-lang-java.
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