Bukkit

package io.github.bswearteam.fsj;
 
import org.bukkit.Bukkit;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerLoginEvent;
import org.bukkit.event.player.PlayerLoginEvent.Result;
import org.bukkit.plugin.java.JavaPlugin;
 
public class FullServerJoin extends JavaPlugin implements Listener {
       
        public void onEnable() {
                Bukkit.getServer().getPluginManager().registerEvents(this, this);
        }
       
        @EventHandler
        public void onPlayerLogin(PlayerLoginEvent e) {
                if (e.getResult() == Result.KICK_FULL) {
                        e.allow();
                }
        }
}