Improve matching the Java version

                    substituteInPlace ./build.gradle --replace-fail '@JAVA_VERSION@' '${javaVersion}'

                    env GRADLE_USER_HOME=$TMPDIR/gradle org.gradle.native.dir=$TMPDIR/native \

                    gradle run --no-daemon --quiet --console plain > $out

                    grep -q "JAVA_VERSION: ${javaVersion}" $out || exit 1

                    test "$(<$out)" = "${javaVersion}"

                  '';

            } // gradle.tests;

          }

public class Main {

    public static void main(String[] args) {

        System.out.println("JAVA_VERSION: " + System.getProperty("java.version"));

        System.out.println(System.getProperty("java.version"));

    }

}