--> Eclipse et java sur le même disque dur

--> Modifier le fichier build.gralde et remplace le contenue de maven de la ligne 8 par :

maven {
url = "https://repo1.maven.org/maven2/"
}

--> Modifier le fichier gradle/wrapper/gradle-wrapper.properties , la distribution doit être en 3.0

Comme ceci :

Ligne 6 : distributionUrl=https\://services.gradle.org/distributions/gradle-3.0-bin.zip

"gradlew"
"gradlew task"
"gradlew setupDecompWorkspace"
"gradlew eclipse"

How to Set Up a Minecraft Server on Ubuntu or Debian

This tutorial explains how to install and configure Minecraft Server on Debian 9. We'll use Systemd to run the Minecraft server and the mcrcon utility to connect to the running instance. We'll also show you how to create a cronjob that will perform regular server backups.