Settings for Java
Target: being able to run Routeconverter

Other java scripts like “Mytourbook” may need a different version of Java! For switching between different versions: See at the end.

Following instructions are working on Fedora30 to run the file RouteConverterLinux.jar.

Check wich version of Java is installed on the machine

$ dnf list installed | grep java
abrt-java-connector.x86_64 1.1.2-1.fc30 @updates
java-1.8.0-openjdk-headless.x86_64 1:1.8.0.222.b10-0.fc30 @updates
javapackages-filesystem.noarch 5.3.0-4.fc30 @fedora
tzdata-java.noarch 2019b-1.fc30 @updates

by me.

Install java11

$ sudo dnf install java-11-openjdk

Now 2 versions of Java are present.
By me, removing java-1.8.0 would remove things like OpenOffice due to dependencies ⇒ java-1.8.0 must stay on the machine.

Check which version of Java is choosen per default

$ java -version
openjdk version "1.8.0_222"
OpenJDK Runtime Environment (build 1.8.0_222-b10)
OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)

Switch to Version 11 per default by selecting “2”

$ sudo alternatives --config java
Il existe 2 programmes qui fournissent « java ».
Sélection Commande
-----------------------------------------------
*+ 1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.222.b10-0.fc30.x86_64/jre/bin/java)
2 java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.4.11-0.fc30.x86_64/bin/java)
Entrez pour garder la sélection courante [+] ou saisissez le numéro de type de sélection :2
[arnaud@fedora-msi ~]$ java -version
openjdk version "11.0.4" 2019-07-16
OpenJDK Runtime Environment 18.9 (build 11.0.4+11)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.4+11, mixed mode, sharing)

Now $ java -jar RouteConverterLinux.jar should start the script.