java -version

openjdk version "14.0.1" 2020-04-14
OpenJDK Runtime Environment AdoptOpenJDK (build 14.0.1+7)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 14.0.1+7, mixed mode, sharing)

cd /opt/tools
wget http://apache.crihan.fr/dist/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz
tar -xvf apache-maven-3.6.3-bin.tar.gz
sudo ln -s /opt/tools/apache-maven-3.6.3 /opt/maven
sudo nano /etc/profile.d/maven.sh

/* Coller 
export JAVA_HOME=/usr/lib/jvm/adoptopenjdk-14-hotspot-amd64/
export M2_HOME=/opt/maven
export MAVEN_HOME=/opt/maven
export PATH=${M2_HOME}/bin:${PATH}

sudo chmod +x /etc/profile.d/maven.sh
source /etc/profile.d/maven.sh

mvn -version

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /opt/maven
Java version: 14.0.1, vendor: AdoptOpenJDK, runtime: /usr/lib/jvm/adoptopenjdk-14-hotspot-amd64
Default locale: fr_FR, platform encoding: UTF-8
OS name: "linux", version: "4.19.0-9-amd64", arch: "amd64", family: "unix"

apt install ghostscript

gs -version

GPL Ghostscript 9.27 (2019-04-04)
Copyright (C) 2018 Artifex Software, Inc.  All rights reserved.