[Java] MySQL

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

public class MySQL {

    private Connection connection;

    private String login = "login";
    private String password = "password"
    private String url = "jdbc:mysql://address:port/database";

    public Connection getConnection() throws SQLException {
        if (login != null)
            return DriverManager.getConnection(url, login, password);
        else return DriverManager.getConnection(url);
    }

    public void query(final String sql) { // выполнить запрос
        try {

            try {
                connection = getConnection();
            } catch (Exception e) {
                System.out.println("MySQL connection error");
                e.printStackTrace();
            }

            Statement statement = connection.createStatement();
            statement.executeUpdate(sql);
            statement.close();
            connection.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static String getString(final String query, final String columnLabel) { // вытащить данные
        String result = null;
        try {
            try {
                connection = getConnection();
            } catch (Exception e) {
                System.out.println("MySQL connection error");
                e.printStackTrace();
            }

            final Statement statement = connection.createStatement();

            final ResultSet resultSet = statement.executeQuery(query);
            if (resultSet.next()) {
                result = resultSet.getString(columnLabel);
            }

            statement.close();
            connection.close();

        } catch (Exception e) {
            e.printStackTrace();
        }

        return result;
    }

}