What is java GUI ?

GUI stands for Graphical User Interface, a term used not only in Java but in all programming languages that support the development of GUIs. A program’s graphical user interface presents an easy-to-use visual display to the user.

To get help you can see the video.

Source code for forgot password page.

Connection con = null;
    ResultSet rs;
    PreparedStatement pst;
    
    public forgotPass() {
        initComponents();
        con = Connect.dbConnect();
        middle();
    }
    
    public void middle(){
        setLocationRelativeTo(null);
    }

try{
            String sql2 = "select password from admin where email = '"+emailTX.getText()+"' and ans='"+answerTF.getText()+"' ";
            pst = con.prepareStatement(sql2);
            rs = pst.executeQuery();
            if(rs.next()){
                jTextField5.setText(rs.getString("password"));
            }else{
                JOptionPane.showMessageDialog(null, "Wrong Answer...!!!");
            }
        }catch(Exception e){
            JOptionPane.showMessageDialog(null, e);
        }

try{
            String sql = "select * from admin where email = '"+emailTX.getText()+"' ";
            pst = con.prepareStatement(sql);
            rs = pst.executeQuery();
            if(rs.next()){
                jTextField2.setText(rs.getString("username"));
                jTextField3.setText(rs.getString("s_que"));
            }else{
                JOptionPane.showMessageDialog(null, "Wrong Email...!!!");
            }
        }catch(Exception e){
            JOptionPane.showMessageDialog(null, e);
        }

Interface of after run the forgot password page.