How to install Java 8 JDK on RN312?

[dsnpevl]

I want to install Java 8 JDK on RN312 (Intel based). I tried:

# apt-get update
# apt-get install default-jdk

It installs Java 7 instead:

# java -version
java version "1.7.0_151"
OpenJDK Runtime Environment (IcedTea 2.6.11) (7u151-2.6.11-1~deb8u1)
OpenJDK 64-Bit Server VM (build 24.151-b01, mixed mode)

What is the correct way to install Java 8 on RN312 or other Intel based models?

I also tried this, but these packages cannot be found:

root@nas-XX-XX-XX:~# apt-get install openjdk-9-jdk
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package openjdk-9-jdk
root@nas-XX-XX-XX:~# apt-get install openjdk-8-jdk
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package openjdk-8-jdk is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'openjdk-8-jdk' has no installation candidate
root@nas-XX-XX-XX:~# apt-get install openjdk-9-jre
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package openjdk-9-jre
root@nas-XX-XX-XX:~# apt-get install openjdk-8-jre
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package openjdk-8-jre

[dsnpevl · Accepted solution]

Seems OpenJDK 8 is available from jessie backports archive. This works for me:

root@nas-XX-XX-XX:~# echo "deb http://http.debian.net/debian jessie-backports main" | tee --append /etc/apt/sources.list.d/jessie-backports.list > /dev/null
root@nas-XX-XX-XX:~# apt-get update
root@nas-XX-XX-XX:~# apt-get install -t jessie-backports openjdk-8-jdk
root@nas-XX-XX-XX:~# java -version
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-8u131-b11-1~bpo8+1-b11)
OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)

See also: https://linux-tips.com/t/how-to-install-java-8-on-debian-jessie/349/2

[dsnpevl · Accepted solution]

Seems OpenJDK 8 is available from jessie backports archive. This works for me:

root@nas-XX-XX-XX:~# echo "deb http://http.debian.net/debian jessie-backports main" | tee --append /etc/apt/sources.list.d/jessie-backports.list > /dev/null
root@nas-XX-XX-XX:~# apt-get update
root@nas-XX-XX-XX:~# apt-get install -t jessie-backports openjdk-8-jdk
root@nas-XX-XX-XX:~# java -version
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-8u131-b11-1~bpo8+1-b11)
OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)

See also: https://linux-tips.com/t/how-to-install-java-8-on-debian-jessie/349/2

[DinDinDaddy]

Just an FYI for all you ARM-based owners, these instructions worked for me as well.  Thanks!