Setting Java_Home

[laidlaws]

I have a password manager and had JAVA_HOME set. Now it has gone. What I am currently using is:

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JAVA_HOME=/usr/lib/jvm/jre-17-openjdk-17.0.14.0.7-1.mga9.x86_64


but it doesn't work. Probably, the string is too long.

What is the correct setting?

[sturmvogel]

https://forums.mageia.org/en/viewtopic.php?f=7&t=8294

https://opensource.com/article/22/3/find-java-home

[doktor5000]

"doesn't work" means what in particular? Also how did you have it set previously and why is it gone all of a sudden ?

BTW: there is no real length limitation for variables/strings.

[laidlaws]

Thanks. "doesn't work means that the command doesnothing. Unread postby sturmvogel 's answer seems to be what I need, but I can't get a title to edit.

[doktor5000]

Which command? If you mean

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JAVA_HOME=/usr/lib/jvm/jre-17-openjdk-17.0.14.0.7-1.mga9.x86_64

then that is expected, only thing this does is setting the environment variable JAVA_HOME to /usr/lib/jvm/jre-17-openjdk-17.0.14.0.7-1.mga9.x86_64

But afterwards you also need to run your actual java application (in the same shell session where you set the environment variable),
you didn't post any error yet what that currently looks like.

[laidlaws]

Yes,, I am doing that. i am running the app after a shell prompt. A Windows user got his going by adding \bin at the end of the line, but in my installation, there is no such command.. About all that I have learned isthat JAVA_HOME will be the folder which contains /bin.

An earlier search said that I should use the path with "jre" instead of the one with "JDK" The result agrees with what I am doing anyway. But in a page I found today, a new user was advised to do the opposite.

[doktor5000]

About all that I have learned isthat JAVA_HOME will be the folder which contains /bin.

No, it's the full path to the folder which contains the actual java binary, so including /bin.

Maybe you should stop guessing, and post some actual details what java JRE/JDKs you have currently installed. As regular user:

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rpm -qa|grep -iE "java|jre|jdk"|sort
update-alternatives --list java
java -version
echo $JAVA_HOME

[morgano]

My invoicing program need a specific java version.
My solution is a very short luncher shell script that sets folder, and calls that java to start the app:

#!/bin/bash
/usr/lib/jvm/java-1.8*/jre/bin/java -jar fribok-2.2*.jar
cd ~/Tribun/Eko/FriBok
exit 0 # done

Then, I have a desktop icon to call that .sh shell script.