Consulta ao mysql

public List<String> getEstoque()   
    {   
        List<String> list = new ArrayList<String>();
        try   
        {   
            Conexao conexao = new Conexao();   
            conexao.conecta();   
  
            String Sql = "SELECT * FROM produto";   
            Statement stm = conexao.conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);   
            ResultSet rs = stm.executeQuery(Sql);   
  
            while(rs.next())   
            {   
                list.add(rs.getString("descricao"));
            }      
        }   
        catch(SQLException e)   
        {   
            e.printStackTrace();   
            System.out.println("Erro de SQL");   
        }   
        return list;
    }