Solved Help with HashMaps/Databases?

Alright, so I'm trying to use a HashMap to change a value of my database since I don't know much about MySQL. I get no errors and when I do the command everything is fine except it doesn't add the value to the database. I have no clue what I'm doing wrong and it's super confusing. The problem is specifically in my commands class and this try-catch statement right here:

Code:

                        int argumentTwo = Integer.parseInt(args[1]);
                        try {
                            PreparedStatement statement1 = core.getConnection()
                                    .prepareStatement("SELECT " + core.table + " SET GOLD=? WHERE UUID=?");
                            ResultSet results = statement1.executeQuery();
                            results.next();
                            statement1.setInt(1, results.getInt("GOLD") + argumentTwo);
                            statement1.setString(2, target.getUniqueId().toString());
                            target.sendMessage(ChatColor.GREEN + "You have recieved " + argumentTwo + " gold!");
                            player.sendMessage("Gave " + target + argumentTwo + " gold.");
                            statement1.executeUpdate();
                        } catch (SQLException e) {
                            e.printStackTrace();
                        }

(I already set the HashMap which is this: final HashMap<UUID, Integer> coins = new HashMap<>()

Commands Class:

Code:

package corelia.koc.main;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.UUID;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

public class Commands implements CommandExecutor {
  
    public Commands(Core core) {
        this.core = core;
        Bukkit.getPluginCommand("add").setExecutor(this);
    }
  
    final HashMap<UUID, Integer> coins = new HashMap<>();
  
    private Core core;
  
    // For entering data use: https://bukkit.org/threads/mysql-update-column.243601/
  
    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String lable, String[] args) {
        Player player = (Player) sender;
        if (!(sender instanceof Player)) {
            sender.sendMessage("You must be a player to access this command!");
        }
        if (cmd.getName().equalsIgnoreCase("add")) {
            if (args.length == 2) {
                Player target = Bukkit.getServer().getPlayer(args[0]);
                if (target == null) {
                    player.sendMessage(ChatColor.RED + "That player isn't online!");
                } else {
                    if (isInt(args[1]) == true) {
                        /*
                        try {
                            PreparedStatement statement = core.getConnection().prepareStatement("SELECT * FROM " + core.table + " WHERE UUID=?");
                            statement.setString(1, uuid.toString());
                            ResultSet results = statement.executeQuery();
                            results.next();
                          
                            int argumentTwo = Integer.parseInt(args[1]);
                          
                            //coins.put(target.getUniqueId(), results.getInt("GOLD") + argumentTwo);
                            results.next();
                            player.sendMessage("Gave " + target + argumentTwo +" gold.");
                            target.sendMessage(ChatColor.GREEN + "You have recieved " + argumentTwo + " gold.");
                        } catch (SQLException e) {
                            e.printStackTrace();
                        }
                        */
                      
                        // Note: Set ResultSet to 0 NOT 1. That is likely the error.
                        int argumentTwo = Integer.parseInt(args[1]);
                        try {
                            PreparedStatement statement1 = core.getConnection()
                                    .prepareStatement("SELECT " + core.table + " SET GOLD=? WHERE UUID=?");
                            ResultSet results = statement1.executeQuery();
                            results.next();
                            statement1.setInt(1, results.getInt("GOLD") + argumentTwo);
                            statement1.setString(2, target.getUniqueId().toString());
                            target.sendMessage(ChatColor.GREEN + "You have recieved " + argumentTwo + " gold!");
                            player.sendMessage("Gave " + target + argumentTwo + " gold.");
                            statement1.executeUpdate();
                        } catch (SQLException e) {
                            e.printStackTrace();
                        }
                    } else {
                        player.sendMessage(ChatColor.RED + "Please use an integer. Example: /pay Xp10d3 50");
                    }
                }
            } else {
                player.sendMessage(ChatColor.RED + "Too few arguments! Correct usage: /pay <player> <amount>");
            }
        }
        return false;
    }
  
    public boolean isInt(String s) {
        try {
            Integer.parseInt(s);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }
}

Core Class:

Code:

package corelia.koc.main;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

public class Core extends JavaPlugin implements Listener {
  
    // MySQL/Database stuff.
    private Connection connection;
    public String host, database, username, password, table;
    public int port;
  
    // Gets the config value.
    FileConfiguration config = getConfig();

    // When the server starts up, create the custom config, load the config, setup the MySQL stuff,
    // and register the MySQLSetterGetter class.
    public void onEnable() {
        loadConfig();
        mysqlSetup();
      
        new Commands(this);
      
        this.getServer().getPluginManager().registerEvents(new MysqlSetterGetter(), this);
    }
  
    // Loads the config (default one).
    public void loadConfig(){
        getConfig().options().copyDefaults(true);
        saveConfig();
    }

    // Connects to the config to get the host, port, database name, username, password, and table.
    // Also sets up the MySQL connection.
    public void mysqlSetup() {
        host = this.getConfig().getString("host");
        port = this.getConfig().getInt("port");
        database = this.getConfig().getString("database");
        username = this.getConfig().getString("username");
        password = this.getConfig().getString("password");
        table = this.getConfig().getString("table");

        try {

            synchronized (this) {
                if (getConnection() != null && !getConnection().isClosed()) {
                    return;
                }

                Class.forName("com.mysql.jdbc.Driver");
                setConnection(
                        DriverManager.getConnection("jdbc:mysql://" + this.host + ":" + this.port + "/" + this.database,
                                this.username, this.password));

                Bukkit.getConsoleSender().sendMessage(ChatColor.GREEN + "MYSQL CONNECTED");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    // Gets the connection.
    public Connection getConnection() {
        return connection;
    }

    // Sets the connection.
    public void setConnection(Connection connection) {
        this.connection = connection;
    }

}

I also get the error that no value is specified for parameter 1.