How to create a login form - OOP in Java?

Question

I already have a inventory system which accesses a certain table on a certain database.

Now I want to create a new frame that will serve as a login form before the user can proceed to the main inventory system frame.

I want it to access the same database but different table, (ex. user_table and item_table under the inventory_system_db database).

If the user logged on an admin account then he can access the inventory system with admin controls (ex. edit, add, delete).

And when he logged on as a normal user he will be able to access the inventory system but without admin controls.

Things I want to know:

• How to create a login form?
• How to make it proceed to inventory system?

Answer 1

If you want a Login Dialog just check the code below.

 public class LoginPane extends JDialog implements ActionListener {
  String itsUsername = "";
  String itsPassword = "";
  boolean itsFirst = true;
  boolean itsKeep = false;
  JTextField itsUserField = new JTextField(15);
  JPasswordField itsPassField = new JPasswordField(15);
  JCheckBox itsKeepBox = new JCheckBox("Save details:", false);
  boolean itsInit = false;

  public LoginPane() {
    super();
setTitle("Login");
setModal(true);
getContentPane().setLayout(new GridLayout(3, 2));
getContentPane().add(new JLabel("Username:"));
getContentPane().add(itsUserField);
getContentPane().add(new JLabel("Password"));
getContentPane().add(itsPassField);
getContentPane().add(itsKeepBox);
JButton submit = new JButton("done");
getContentPane().add(submit);
submit.addActionListener(this);
pack();
 }

public String[] getLogin() {
if (!itsKeep && !itsFirst) {
  return null;
}
if (!itsInit) {
  return null;
}
itsFirst = false;
String[] res = new String[2];
res[0] = itsUsername;
res[1] = itsPassword;
if (!itsKeep) {
  itsUsername = "";
  itsPassword = "";
}
return res;
  }

  public void actionPerformed(ActionEvent e) {
itsUsername = itsUserField.getText();
itsPassword = new String(itsPassField.getPassword());
itsKeep = itsKeepBox.isSelected();
itsInit = true;
setVisible(false);
}
}

You can add action for button as you wish!