try{
            String sql = "SELECT * FROM frame where username = '"+jTextField1.getText()+" ' AND password = '"+jTextField2.getText()+"'";
            statement = con.createStatement();
            resultSet = statement.executeQuery(sql);

            if(resultSet.next()==true && jTextField1.getText()!=null && jTextField2.getText()!=null){
                String s ="login sucess";
                JOptionPane.showMessageDialog(this,s);
                NewJFrame n = new NewJFrame();
                super.dispose();
                n.setVisible(true);
            }
            else{
                System.out.println("notcnnected");
            }
        }
        catch(Exception e){
            System.out.println
        (e);
        }