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I'am trying to get Maven running. I have installed JDK and Maven. Thus I have been trying to set the Java_home variable for three days now, I cannot get it working.

I have followed the instructions of another askUbuntu Topic:

This doesn't work. Not any explanation explains how to set the path, they rather give examples how to set their path.. So I have no idea whats wrong with mine, it is the location to the file in the etc/environment.

I installed maven by downloading the correct latest version on the site. Extracted and installed it in opt directory using known sudo-commands.

I created the maven.sh file myself, since there wasn't a file like this in the profile.d directory. You can see how I set that in the cat output and the picture below.

The Java_Home set in my etc/environement though is: JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64";This used to be /usr/opt/jdk-13.0.1 (which you will see the terminal give back the first time), because thats how I thought It needed to work according to explanation how to install Maven.

When I source my maven.sh, I get the right mvn -version in the terminal. When I close terminal, I have to source it again.

Here my terminal feedback on the versions, rember that after the first 3 commands (version -java, -mvn and echo) I source my maven.sh file manually:

mussche@MuskiProBook:~$ java -version
openjdk version "11.0.11" 2021-04-20
OpenJDK Runtime Environment (build 11.0.11+9-Ubuntu-0ubuntu2.20.04)
OpenJDK 64-Bit Server VM (build 11.0.11+9-Ubuntu-0ubuntu2.20.04, mixed mode, sharing)

mussche@MuskiProBook:~$ mvn -version
The JAVA_HOME environment variable is not defined correctly,
this environment variable is needed to run this program.

mussche@MuskiProBook:~$ echo $JAVA_HOME
/usr/opt/jdk-13.0.1

mussche@MuskiProBook:~$ java -version
openjdk version "11.0.11" 2021-04-20
OpenJDK Runtime Environment (build 11.0.11+9-Ubuntu-0ubuntu2.20.04)
OpenJDK 64-Bit Server VM (build 11.0.11+9-Ubuntu-0ubuntu2.20.04, mixed mode, sharing)

mussche@MuskiProBook:~$ mvn -version
Apache Maven 3.8.2 (ea98e05a04480131370aa0c110b8c54cf726c06f)
Maven home: /opt/maven
Java version: 11.0.11, vendor: Ubuntu, runtime: /usr/lib/jvm/java-11-openjdk-amd64
Default locale: nl_NL, platform encoding: UTF-8
OS name: "linux", version: "5.11.0-27-generic", arch: "amd64", family: "unix"

mussche@MuskiProBook:~$ echo $JAVA_HOME
/usr/lib/jvm/java-11-openjdk-amd64

mussche@MuskiProBook:~$ cat /etc/environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin"
JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64"

mussche@MuskiProBook:~$ cat /etc/profile.d/maven.sh
export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
export M2_HOME=/opt/maven
export MAVEN_HOME=/opt/maven
export PATH=${M2_HOME}/bin:${PATH}

/etc/profile.d/maven.sh content:

/etc/profile.d/maven.sh

How to install maven correct? How to set the variables, where to find the files that need to be changed, and exactly how to change them?

Muske Yannick
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  • Is this the right version of the JDK for the version of Maven you have installed? – David Sep 08 '21 at 06:48
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    `/etc/environment` isn't a shell script, don't use `;` to end lines in it. – muru Sep 08 '21 at 07:02
  • @MuskeYannick Can you share screenshot from IntelliJ? Also, did you mistype `environment` in question only or in terminal as well? Is `mvn` working when `JAVA_HOME` is set to Java 11? Also, please note that Java 13 was a non-LTS release and has reached its end of life. – Kulfy Sep 08 '21 at 07:23
  • @MuskeYannick You can upload image by clicking on [edit] button and hit Ctrl+G (if you're unable to find icon with picture while editing). Also, how did you install maven? Did you create `maven.sh` on your own? I also use maven, Java, Ubuntu and Eclipse/IntelliJ and didn't find any problems. I don't even set `JAVA_HOME` in my installation. So, you might want to edit your question to explain what and how you installed things and what exact problems you're facing with regards to Java/IntelliJ, redacting other things. Fo example, I don't think "*Dear Ubuntu....*" is relevant to the issue. – Kulfy Sep 08 '21 at 07:50
  • My 2 questions are still unanswered: 1. how did you install maven? and 2. Did you create `maven.sh` on your own? Let's check the current status of files. Please edit your question and add the output of `cat /etc/environment` and `cat /etc/profile.d/maven.sh`. – Kulfy Sep 08 '21 at 08:14
  • Hey, Deleted previous posts to create more space. I've altered my question with more specific details as requested. The installation of Maven, I downloaded, extracted and installed in opt. – Muske Yannick Sep 08 '21 at 08:37

2 Answers2

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I solved the issue. I don't exactly why, but after several restarts (not after just one) the path got set instantly instead of me having to manually source it.

Kr,

Yannick

Muske Yannick
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For ubuntu - to add Java-openJdk and Maven

  1. Install OpenJDK through CLI
  2. Move Maven and Gradle to /opt/

Working config for openjdk-17

sudo vim /etc/profile


export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=$JAVA_HOME/jre/lib/ext:$JAVA_HOME/lib/tools.jar

export GRADLE_HOME=/opt/gradle-8.1
PATH=$PATH:$GRADLE_HOME/bin

export MAVEN_HOME=/opt/apache-maven-3.9.1
PATH=$PATH:$MAVEN_HOME/bin

I saw one restart required, then check mvn --version

Paul Bradbury
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