Updating A Scoreboards Objectives!

OK so i am having a problem that when every I try and update my scoreboard if a number is different it will just add another line! I was wondering if anyone knows how I can fix this. Here is most of my main class. It includes all of the scoreboard related methods.

Code:java

package me.chasertw123.kitpvp;
 
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.logging.Logger;
 
import me.chasertw123.kitpvp.kits.ArcherKit;
import me.chasertw123.kitpvp.kits.SnowmanKit;
import me.chasertw123.kitpvp.listeners.DoubleJumpListener;
import me.chasertw123.kitpvp.listeners.PlayerListener;
import me.chasertw123.kitpvp.listeners.SoupListener;
import me.chasertw123.kitpvp.misc.Messages;
import me.chasertw123.kitpvp.misc.Rankings;
import me.chasertw123.kitpvp.misc.Repair;
import me.chasertw123.kitpvp.misc.TeleportHandler;
import me.chasertw123.kitpvp.misc.Soup;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.ScoreboardManager;
 
public class KitPvP extends JavaPlugin {
 
    /** Has Kit Checker **/
    public static ArrayList<String> haskit = new ArrayList<String>();
 
    /** Repair/Refill Array Lists **/
    public static ArrayList<String> refill = new ArrayList<String>();
    public static ArrayList<String> repair = new ArrayList<String>();
 
    /** Free Player Kit Array Lists **/
    public static ArrayList<String> barbarian = new ArrayList<String>();
    public static ArrayList<String> pyro = new ArrayList<String>();
    public static ArrayList<String> archer = new ArrayList<String>();
    public static ArrayList<String> snowman = new ArrayList<String>();
    public static ArrayList<String> ninja = new ArrayList<String>();
 
    /** Premium Player Kit Array List **/
    public static ArrayList<String> dragon = new ArrayList<String>();
    public static ArrayList<String> irongolem = new ArrayList<String>();
 
    /** Inventory Saver HashMaps **/
    public static HashMap<String, ItemStack[]> invsave = new HashMap<String, ItemStack[]>();
    public static HashMap<String, ItemStack[]> armorsave = new HashMap<String, ItemStack[]>();
 
    /** Ranking System HashMap **/
    public static HashMap<String, Integer> scores;
    public static HashMap<String, Integer> kills;
    public static HashMap<String, Integer> deaths;
    public static HashMap<String, Integer> money;
 
    public static KitPvP plugin;
 
    Repair rep;
    Soup RefillSoup;
    static ArcherKit ArcherSpecial;
    static SnowmanKit SnowmanSpecial;
 
    double kdr = 0.0;
 
    public ScoreboardManager manager;
    public Scoreboard board;
    public Scoreboard reset;
    public Objective resetobj;
    public Objective obj;
 
    Logger logger = Logger.getLogger("Minecraft");
 
    /** Enabled **/
    @SuppressWarnings("unchecked")
    public void onEnable() {       
        rep = new Repair(this);
        RefillSoup = new Soup(this);
        ArcherSpecial = new ArcherKit(this);
        SnowmanSpecial = new SnowmanKit(this);
 
        File dir = getDataFolder();
        if (!dir.exists())
            if(!dir.mkdir())
                logger.severe("Could not create directory for plugin: " + getDescription().getName());
 
        scores = (HashMap<String, Integer>) load(new File(getDataFolder(), "scores.dat"));
        kills = (HashMap<String, Integer>) load(new File(getDataFolder(), "kills.dat"));
        deaths = (HashMap<String, Integer>) load(new File(getDataFolder(), "deaths.dat"));
        money = (HashMap<String, Integer>) load(new File(getDataFolder(), "money.dat"));
        if (scores == null) scores = new HashMap<String, Integer>();
        if (kills == null) kills = new HashMap<String, Integer>();
        if (deaths == null) deaths = new HashMap<String, Integer>();
        if (money == null) money = new HashMap<String, Integer>();
 
        getServer().getMessenger().registerOutgoingPluginChannel(this, "BungeeCord");
        this.getConfig().options().copyDefaults(true);
        this.saveConfig();
        registerEvents();
 
        manager = Bukkit.getServer().getScoreboardManager();
        board = manager.getNewScoreboard();
        reset = manager.getNewScoreboard();
        obj = board.registerNewObjective("Test", "dummy");
        resetobj = reset.registerNewObjective("Reset", "dummy");
 
        logger.info("[CrownPvP] has been enabled!");
    }
 
    /** Disable **/
    public void onDisable() {
        save(scores, new File(getDataFolder(), "scores.dat"));
        save(kills, new File(getDataFolder(), "kills.dat"));
        save(deaths, new File(getDataFolder(), "deaths.dat"));
        save(money, new File(getDataFolder(), "money.dat"));
        logger.info("[CrownPvP] has been disabled!");
    }
 
    /** Event Register **/
    public void registerEvents() {
        PluginManager pm = this.getServer().getPluginManager();
        pm.registerEvents(new KitSelector(this), this);
        pm.registerEvents(new Special(this), this);
        pm.registerEvents(new PlayerListener(this), this);
        pm.registerEvents(new DoubleJumpListener(this), this);
        pm.registerEvents(new SoupListener(this), this);
        pm.registerEvents(new Rankings(this), this);
    }
 
    /** Save Objects **/
    public void save(Object o, File f) {
        try {
            if (!f.exists())
                f.createNewFile();
 
            ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(f));
            oos.writeObject(o);
            oos.flush();
            oos.close();
        } catch (Exception e) {e.printStackTrace();}
    }
 
    /** Load Objects **/
    public Object load(File f) {
        try {
            ObjectInputStream ois = new ObjectInputStream(new FileInputStream(f));
            Object result = ois.readObject();
            ois.close();
            return result;
        } catch (Exception e) {return null;}
    }
 
    /** Argument To Integer **/
    public static boolean isInt(String s) {
        try {
            Integer.parseInt(s);
        } catch (NumberFormatException nfe) {
            return false;
        }
        return true;
    }
 
    /** Send To Hub **/
    public void sendToServer(Player p, String ts) {
        ByteArrayOutputStream b = new ByteArrayOutputStream();
        DataOutputStream out = new DataOutputStream(b);
 
        try {
            out.writeUTF("Connect");
            out.writeUTF(ts);
        } catch (Exception e) {e.printStackTrace();}
        p.sendPluginMessage(this, "BungeeCord", b.toByteArray());
    }
 
    /** Update Scoreboard **/
    // Fix the updating numbers //
    public void update(Objective obj, Player p) {
 
        obj.setDisplaySlot(DisplaySlot.SIDEBAR);
        obj.setDisplayName(ChatColor.GOLD + "" + ChatColor.BOLD + "Your Stats");
 
        if (!(kills.containsKey(p.getName()) && deaths.containsKey(p.getName()))) return;
 
        double dd = deaths.get(p.getName());
        double dk = kills.get(p.getName());
 
        try {kdr = dk / dd;} catch (ArithmeticException e) {kdr = 0.0;}
 
        int k = kills.get(p.getName());
        int d = deaths.get(p.getName());
        int c = money.get(p.getName());
 
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.GREEN + "Kills:")).setScore(10);
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.WHITE + "" + k + " ")).setScore(9);
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.GRAY + " ")).setScore(8);
 
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.GREEN + "Deaths:")).setScore(7);
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.WHITE + "" + d)).setScore(6);
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.GRAY + "  ")).setScore(5);
 
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.GREEN + "KDR:")).setScore(4);
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.WHITE + "" + kdr)).setScore(3);
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.GRAY + "  ")).setScore(2);
 
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.GREEN + "Coins:")).setScore(1);
        obj.getScore(Bukkit.getOfflinePlayer(ChatColor.WHITE + "" + c + "  ")).setScore(0);
 
        p.setScoreboard(board);
    }

Thanks for reading!

 

Remove the old line first.

 

tissin
Can you elaborate on how to do this. Sorry this is my first time working with scoreboards!

Also I am having a problem were if the players kdr is a decimal they will immediately crash. Does anyone know how to fix this?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

cast double to both kills and deaths
chasertw123

 

tommyhoogstra
Ok I fixed that but I still need to know how to reset the scoreboard completely.

Bump!