B4J Question OpenJDK11 on Debian 9

[PatrikCavina]

I'm building a virtual machine with debian 9 to use like VPS.
I'm trying to install openJDK11 but i can't find the package and a good tutorial to install it and run apps compiled with openJDK 11.
Has anyone managed to install openjdk11 on a debian machine?
If so, please explain how you did it
Thanks

 

[xulihang]

The default jdk version on Debian 9 is OpenJDK 8. You can manually download OpenJDK 11 binary files here: http://jdk.java.net/11/

 

[PatrikCavina]

I downloaded and extracted it with command "tar xvf openjdk-11.0.2_linux-x64_bin.tar.gz" in folder: /opt/java.
I set the environment variable JAVA_HOME with the location of java folder and i've added it to PATH variable.

export JAVA_HOME="/opt/java/jdk-11.0.2"
export PATH=$PATH:$JAVA_HOME/bin

But if i run command: java -version, this is the result:

openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-2~deb9u1-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)

Instead if i run command: javac -version, this is the result:

javac 11.0.2

Any Tips?

 

[Daestrum]

Look here https://www.mkyong.com/linux/debian-change-default-java-version/

It may solve your problem.

 

[PatrikCavina]

Using command:

apt-get install openjdk-11-jdk openjdk-11-jre

The result is:

Unable to locate package openjdk-11-jdk
Unable to locate package openjdk-11-jre

 

[Daestrum]

Sorry I meant this bit on the page

2. Update Java alternative path :
$ sudo update-alternatives --config java


Also there is no jre for Java 11

 

[Erel]

Note that JDK 11 is not enough for UI apps. You need to include OpenJDK as well.

Complete packages for Windows, Mac and Linux are available here: https://www.b4x.com/android/forum/t...the-simplest-way-to-distribute-ui-apps.99835/

 

[PatrikCavina]

Can i set OpenJDK 11 (for linux) as default?
Or i must set JAVA_HOME environment variable to point to jdk-11.0.1, and run all jar programs with command "$JAVA_HOME/bin java -jar filename.jar"?

 

[Erel]

I'm not a Linux expert. Try this: https://askubuntu.com/a/498227

I usually create simple script files that start the servers (or any other app) with the correct Java version.

 

[PatrikCavina]

All configured, your link and this link: https://www.digitalocean.com/commun...install-oracle-java-on-a-debian-or-ubuntu-vps, have solved my problems