KDRPlugin

package me.Mrjoecool234.kdr;

import java.util.logging.Logger;

import org.bukkit.Bukkit;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.event.player.AsyncPlayerChatEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class KDRMain extends JavaPlugin implements Listener {

	Logger log = Logger.getLogger("Minecraft");

	int kills = getConfig().getInt("kills");
	int defkills = 1;
	int defdeaths = 1;
	int deaths = getConfig().getInt("deaths");
	double kdr = deaths / kills;


	@Override
	public void onEnable() {
		log.info("KDRPlugin Enabled");
		Bukkit.getServer().getPluginManager().registerEvents(this,this);
		getConfig().options().copyDefaults(true);
		saveConfig();
	}

	@Override
	public void onDisable() {
		log.info("KDRPlugin Disabled");
		saveConfig();
	}

	@EventHandler
	public void Kills(PlayerDeathEvent event){
		Player player = event.getEntity();
		Player killer = event.getEntity().getKiller();
		String playername = player.getName();
		if(killer instanceof Entity){
			getConfig().set(playername + ".kills", getConfig().getInt(playername + ".kills") + 1);
			getConfig().set(playername + ".kdr", getConfig().getDouble(playername + this.getConfig().getInt(".kills")/this.getConfig().getInt(".deaths")));
			saveConfig();
		}
		if(player instanceof Entity){
			getConfig().set(playername + ".deaths", getConfig().getInt(playername + ".deaths") + 1);
			getConfig().set(playername + ".kdr", getConfig().getDouble(playername + this.getConfig().getInt(".kills")/this.getConfig().getInt(".deaths")));
			saveConfig();
		}
	}
	@EventHandler
    public void onPlayerChat(AsyncPlayerChatEvent event) {
		String playername = event.getPlayer().getName();
		event.getPlayer().setDisplayName(kdr + " " + p.getName());
	 }
	 @EventHandler
	 public void onPlayerJoin(PlayerJoinEvent event) {
		 String playername = event.getPlayer().getName();
		 getConfig().set(playername + ".kills", defkills);
		 getConfig().set(playername + ".deaths", defdeaths);
		 saveConfig();
	 }
}