Scoreboard MiniGame Win

So my mini-game (Call of Duty) is a scoreboard mini-game that I coded in Java during my free time.
I want it so that if the score is (lets say) 10, then the player would win and the scoreboard will get reset.

Code:

package com.GalaxyDevelope.COD;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerRespawnEvent;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Score;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.ScoreboardManager;
import org.bukkit.scoreboard.Team;
 
public class COD extends JavaPlugin implements Listener {
    @SuppressWarnings({ "deprecation"})
    @Override
    public void onEnable() {
        System.out.println("Call of Duty Has Been Enabled!");
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
   
    ScoreboardManager manager = Bukkit.getScoreboardManager();
    Scoreboard boardA = manager.getNewScoreboard();
    Scoreboard boardB = manager.getNewScoreboard();
    Team teamA = boardA.registerNewTeam("Red");
    Team teamB = boardB.registerNewTeam("Blue");
    Objective objA = boardA.registerNewObjective("§aCOD", "playerKillCount");
    Objective objB = boardB.registerNewObjective("§aCOD", "playerKillCount");
    objA.setDisplaySlot(DisplaySlot.SIDEBAR);
    objB.setDisplaySlot(DisplaySlot.SIDEBAR);
    Score scoreA = objA.getScore(ChatColor.GREEN + "Kills:"); //Get a fake offline player
    Score scoreB = objB.getScore(ChatColor.GREEN + "Kills:"); //Get a fake offline player
    scoreA.setScore(0);
    scoreB.setScore(0);
    int i = 0;
            for(Player player : Bukkit.getOnlinePlayers()) {
                if(i < Bukkit.getOnlinePlayers().length / 2) {
                    //ADD TO RED TEAM
                    player.sendMessage(ChatColor.DARK_RED + "You Have Been Added To The Red Team");
                    teamA.addPlayer(player);
                    teamA.setAllowFriendlyFire(false);
                    teamA.setPrefix(ChatColor.DARK_RED + "[RED] ");
                    Location location = player.getLocation();
                    location.setX(-1145);
                    location.setY(63);
                    location.setZ(390);
                    player.teleport(location);
                    player.setScoreboard(boardA);
                    if(teamA.hasPlayer(player) && objA.equals(10)) {
                        boardA.resetScores(player);
                        boardB.resetScores(player);
                        Bukkit.broadcastMessage(ChatColor.DARK_RED + "The Red Team Wins!");
                    }
                } else {
                    //ADD TO BLUE TEAM
                    player.sendMessage(ChatColor.AQUA + "You Have Been Added To The Blue Team");
                    teamB.addPlayer(player);
                    teamB.setAllowFriendlyFire(false);
                    teamB.setPrefix(ChatColor.AQUA + "[BLUE] ");
                    Location location = player.getLocation();
                    location.setX(-950);
                    location.setY(63);
                    location.setZ(378);
                    player.teleport(location);
                    player.setScoreboard(boardB);
                    if(scoreB.equals(10)) {
                        boardA.resetScores(player);
                        boardB.resetScores(player);
                        Bukkit.broadcastMessage(ChatColor.AQUA + "The Blue Team Wins!");
                    }
                }
                i++;
 
}
}
    @SuppressWarnings("deprecation")
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        if(commandLabel.equalsIgnoreCase("COD") && sender.hasPermission("cod.use")) {
       
        ScoreboardManager manager = Bukkit.getScoreboardManager();
        Scoreboard boardA = manager.getNewScoreboard();
        Scoreboard boardB = manager.getNewScoreboard();
        Team teamA = boardA.registerNewTeam("Red");
        Team teamB = boardB.registerNewTeam("Blue");
        Objective objA = boardA.registerNewObjective("COD", "playerKillCount");
        Objective objB = boardB.registerNewObjective("COD", "playerKillCount");
        objA.setDisplaySlot(DisplaySlot.SIDEBAR);
        objB.setDisplaySlot(DisplaySlot.SIDEBAR);
        Score scoreA = objA.getScore(ChatColor.GREEN + "Kills:"); //Get a fake offline player
        Score scoreB = objB.getScore(ChatColor.GREEN + "Kills:"); //Get a fake offline player
        scoreA.setScore(0);
        scoreB.setScore(0);
        int i = 0;
                for(Player player : Bukkit.getOnlinePlayers()) {
                    if(i < Bukkit.getOnlinePlayers().length / 2) {
                        //ADD TO RED TEAM
                        player.sendMessage(ChatColor.DARK_RED + "You Have Been Added To The Red Team");
                        teamA.addPlayer(player);
                        teamA.setAllowFriendlyFire(false);
                        teamA.setPrefix(ChatColor.DARK_RED + "[RED] ");
                        Location location = player.getLocation();
                        location.setX(-1145);
                        location.setY(63);
                        location.setZ(390);
                        player.teleport(location);
                        player.setScoreboard(boardA);
                        if(scoreA.equals(10)) {
                            boardA.resetScores(player);
                            boardB.resetScores(player);
                            Bukkit.broadcastMessage(ChatColor.DARK_RED + "The Red Team Wins!");
                        }
                    } else {
                        //ADD TO BLUE TEAM
                        player.sendMessage(ChatColor.AQUA + "You Have Been Added To The Blue Team");
                        teamB.addPlayer(player);
                        teamB.setAllowFriendlyFire(false);
                        teamB.setPrefix(ChatColor.AQUA + "[BLUE] ");
                        Location location = player.getLocation();
                        location.setX(-950);
                        location.setY(63);
                        location.setZ(378);
                        player.teleport(location);
                        player.setScoreboard(boardB);
                        if(scoreB.equals(10)) {
                            boardA.resetScores(player);
                            boardB.resetScores(player);
                            Bukkit.broadcastMessage(ChatColor.AQUA + "The Blue Team Wins!");
                        }
                    }
                    i++;
 
    }
        }
        return false;
    }
    @SuppressWarnings("deprecation")
    public void scoreboard(){
        ScoreboardManager manager = Bukkit.getScoreboardManager();
        Scoreboard boardA = manager.getNewScoreboard();
        Scoreboard boardB = manager.getNewScoreboard();
        Team teamA = boardA.registerNewTeam("Red");
        Team teamB = boardB.registerNewTeam("Blue");
        Objective objA = boardA.registerNewObjective("COD", "playerKillCount");
        Objective objB = boardB.registerNewObjective("COD", "playerKillCount");
        objA.setDisplaySlot(DisplaySlot.SIDEBAR);
        objB.setDisplaySlot(DisplaySlot.SIDEBAR);
        Score scoreA = objA.getScore(ChatColor.GREEN + "Kills:"); //Get a fake offline player
        Score scoreB = objB.getScore(ChatColor.GREEN + "Kills:"); //Get a fake offline player
        scoreA.setScore(0);
        scoreB.setScore(0);
        int i = 0;
                for(Player player : Bukkit.getOnlinePlayers()) {
                    if(i < Bukkit.getOnlinePlayers().length / 2) {
                        //ADD TO RED TEAM
                        player.sendMessage(ChatColor.DARK_RED + "You Have Been Added To The Red Team");
                        teamA.addPlayer(player);
                        teamA.setAllowFriendlyFire(false);
                        teamA.setPrefix(ChatColor.DARK_RED + "[RED] ");
                        Location location = player.getLocation();
                        location.setX(-1145);
                        location.setY(63);
                        location.setZ(390);
                        player.teleport(location);
                        player.setScoreboard(boardA);
                        if(teamA.getPlayers().contains(player) && scoreA.equals(10)) {
                            boardA.resetScores(player);
                            boardB.resetScores(player);
                            Bukkit.broadcastMessage(ChatColor.DARK_RED + "The Red Team Wins!");
                        }
                    } else {
                        //ADD TO BLUE TEAM
                        player.sendMessage(ChatColor.AQUA + "You Have Been Added To The Blue Team");
                        teamB.addPlayer(player);
                        teamB.setAllowFriendlyFire(false);
                        teamB.setPrefix(ChatColor.AQUA + "[BLUE] ");
                        Location location = player.getLocation();
                        location.setX(-950);
                        location.setY(63);
                        location.setZ(378);
                        player.teleport(location);
                        player.setScoreboard(boardB);
                        if(scoreB.equals(10)) {
                            boardA.resetScores(player);
                            boardB.resetScores(player);
                            Bukkit.broadcastMessage(ChatColor.AQUA + "The Blue Team Wins!");
                        }
                    }
                    i++;
 
    }
    }
    @EventHandler
    public void onjoin(PlayerJoinEvent e){
        ScoreboardManager manager = Bukkit.getScoreboardManager();
        Scoreboard boardA = manager.getNewScoreboard();
        Scoreboard boardB = manager.getNewScoreboard();
        Objective objA = boardA.registerNewObjective("COD", "playerKillCount");
        Objective objB = boardB.registerNewObjective("COD", "playerKillCount");
        objA.setDisplaySlot(DisplaySlot.SIDEBAR);
        objB.setDisplaySlot(DisplaySlot.SIDEBAR);
        Player p = e.getPlayer();
        p.setScoreboard(boardA);
    }
    public void onPlayerRespawn(PlayerRespawnEvent e){
        Player player = e.getPlayer();
        ScoreboardManager manager = Bukkit.getScoreboardManager();
        Scoreboard boardA = manager.getNewScoreboard();
        Scoreboard boardB = manager.getNewScoreboard();
        Team teamA = boardA.registerNewTeam("Red");
        Objective objA = boardA.registerNewObjective("COD", "playerKillCount");
        Objective objB = boardB.registerNewObjective("COD", "playerKillCount");
        objA.setDisplaySlot(DisplaySlot.SIDEBAR);
        objB.setDisplaySlot(DisplaySlot.SIDEBAR);
        if(teamA.hasPlayer(player)) {
            Location location = player.getLocation();
            location.setX(-1145);
            location.setY(63);
            location.setZ(390);
            player.teleport(location);
        }
        else {
            Location location = player.getLocation();
            location.setX(-950);
            location.setY(63);
            location.setZ(378);
            player.teleport(location);
        }
    }
}

 

Moved to Plugin Developement.

 

First of all please use a method to do blocks of code over and over and over.... Also, i dont have the time to read and edit the code. but the idea is that when someone reaches 10 kills, add him in a arraylist, if the arraylist size is == 10 then stop the game and show the scoreboard to the players.
Good luck : )