import java.sql.*;

public class MySqlCode {

    public static void main(String[] args) throws Exception {
        String usuario = "user";
        String password = "pass";
        String url = "jdbc:mysql://servidor:3306/db";

        try (Connection conexion = DriverManager.getConnection(url, usuario, password);
            PreparedStatement ps = conexion.prepareStatement("select * from tbl");
            ResultSet rs = ps.executeQuery()) {

            while (rs.next()) {
                System.out.printf(
                    "%s-%s%n",
                    rs.getString("col1"),
                    rs.getString("col2"));
            }
        }
    }
}