Conexion Mysql con Java desde Netbeans

public Config(){} /*Constructor*/
private final String database = "dbprueba";
private final String url = "jdbc:mysql://127.0.0.1/"+database;
private final String user = "root";
private final String pass = "";
private Connection cnn = null;

public Connection conectado(){
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            cnn = DriverManager.getConnection(url, user, pass);
        } catch (ClassNotFoundException | SQLException e) {
            JOptionPane.showMessageDialog(null, "Eror al conecta" + e);
        }
        
        return cnn;
    }

public void desconectado(){
    try {
       if (cnn != null){
          cnn.close();
       }
   } catch (SQLException e) {}
}