Source code program makes Login system with Netbeans

Source code program makes Login system with Netbeans

Login system makes the keypad / button that can not access / click can be activated and can be accessed / click .

1.      Design main display form as in the picture below

#Sub menu Login will be changed automatically be Logout when Login was successful.

#all key / button is not active ( enabled = false ) .

2.      Create a database ( I'm using MySQL ) , following the example of the database structure to table his admin

3.      Do not forget Add Library MySQL JDBC drivers , how to stay right-click on Libraries > Select the Add Library to display the following

4.      If the MySQL JDBC Driver has not any , click the Import button and locate the file its MySQL JDBC Driver and then select the file and press Ok .After successfully import , select the file again its MySQL JDBC Driver and then click the Add Library

5.      For the system source code Login Login Button Right click > Events > Action > actionPerformed then type the following code

try {

            Connection koneksi=DriverManager.getConnection("jdbc:mysql://localhost:3306/medica","root","");

            Statement stat= koneksi.createStatement();

            ResultSet rs=stat.executeQuery("select count(id_admin) from admin where id_admin='"+jPasswordUser.getText()+"' and password='"+jPasswordPass.getText()+"'" );

            if(rs.next()){

                int id_admin=rs.getInt(1);

                if(id_admin>0){

                    TbObat.setEnabled(true);

                    TbTindakan.setEnabled(true);

                    TbDokter.setEnabled(true);

                    TbPasien.setEnabled(true);

                    TbPetugas.setEnabled(true);

                    Login.setText("Logout");       //merubah sub menu Login menjadi Logout

                    PanelLogin.setVisible(false);

                    jPasswordPass.setText("");

                    jPasswordUser.setText("");

                }else {

                    TbObat.setEnabled(false);

                    TbTindakan.setEnabled(false);

                    TbDokter.setEnabled(false);

                    TbPasien.setEnabled(false);

                    TbPetugas.setEnabled(false);

                    Login.setText("Login");

                    JOptionPane.showMessageDialog(null,"Maaf, Username atau Password SALAH,Silahkan ulangi Login...!");

                    jPasswordUser.setFocusable(true);

                    jPasswordPass.setText("");

                    jPasswordUser.setText("");

                }

            }

        } catch (SQLException ex) {

            System.out.println(ex);

        }

#Description: The name of the database , table , field , button , TextField , form Login adjust to have each of you .

6.      Later on also click the Right Button Cancel > Events > Action > actionPerformed then type the following code :

  jPasswordPass.setText("");

        jPasswordUser.setText("");

        PanelLogin.setVisible(false);

7.      Try the program in the Run and see the results !

- The initial view when the sub menu Log in clicks , all the key / button is not active as yet Login

- Display when Button click Login and Login successful , turned into a sub menu Login Logout automatic and all key / button is active

- Display as Username and Password are entered incorrectly , the textfield will return empty . When the Cancel button is clicked Login form will disappear

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good luck and HAPPY CODING : D