What is java GUI ?

GUI stands for Graphical User Interface, a time period used not best in Java however in all programming languages that guide the improvement of GUIs. A software’s graphical consumer interface affords an easy-to-use visual display to the person.

Source code for admin login of the project.

1. Sells and calculations.

try{
            String sql = "select username,password from admin where username=? and password=? ";
            pst = con.prepareStatement(sql);
            pst.setString(1, jTextField1.getText());
            pst.setString(2, jPasswordField1.getText());
            rs = pst.executeQuery();
            if(rs.next()){
                dispose();
                new SellAndCalculate().setVisible(true);
            }else{
                JOptionPane.showMessageDialog(null, "Wrong Infogmation","Error",JOptionPane.ERROR_MESSAGE);
            }
        }catch(Exception e){
            JOptionPane.showMessageDialog(null, e);
        }

2. Restaurant information update.

try{
            String sql = "select password from admin where password=? ";
            pst = con.prepareStatement(sql);
            pst.setString(1, jPasswordField2.getText());
            rs = pst.executeQuery();
            if(rs.next()){
                dispose();
                new UpdateAndInsert().setVisible(true);
            }else{
                JOptionPane.showMessageDialog(null, "Wrong Infogmation","Error",JOptionPane.ERROR_MESSAGE);
            }
        }catch(Exception e){
            JOptionPane.showMessageDialog(null, e);
        }

3. Restaurant owner access…

try{
            String sql = "select username,password from owner where username=? and password=? ";
            pst = con.prepareStatement(sql);
            pst.setString(1, jTextField2.getText());
            pst.setString(2, jPasswordField3.getText());
            rs = pst.executeQuery();
            if(rs.next()){
                dispose();
                new Owner().setVisible(true);
            }else{
                JOptionPane.showMessageDialog(null, "Wrong Infogmation","Error",JOptionPane.ERROR_MESSAGE);
            }
        }catch(Exception e){
            JOptionPane.showMessageDialog(null, e);
        }

Interface of after run the page.