Setting Java version for maven build

Question

I am trying to set the java version for a maven build when I execute it from a shell script. Fot some reason it is not picking up the intended java version. Any advise welcome.<

Answer 1

I found a solution:

If I set, this it works. Maven compiles the code.

    <executable>/usr/lib/jvm/jdk-14.0.2/bin/javac</executable>

However, this is not ideal because the path to the install is hard-coded, so on other servers with a different JAVA_HOME location, it won't work. Is it possible to reference $JAVA_HOME from within the POM file? and do something like this?

    <executable><$JAVA_HOME>/bin/javac</executable>

e.g.

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <release>${java.version}</release>
                <source>${java.version}</source>
                <target>${java.version}</target>
                <compilerVersion>${java.version}</compilerVersion>
                <fork>true</fork>
                <executable>/usr/lib/jvm/jdk-14.0.2/bin/javac</executable>
            </configuration>
        </plugin>