import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class LoginMain {

    private JFrame frame;
    private JTextField userNameField;
    private JPasswordField passwordField;

    public LoginMain() {
        initalize();
    }

    private void initalize()
    {
    frame = new JFrame();
    frame.setBounds(100, 100, 450, 300);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().setLayout(null);
    frame.setTitle("Staff Portal");

    JLabel username = new JLabel("Username");
    username.setBounds(75, 90, 70, 15);
    frame.getContentPane().add(username);

    userNameField = new JTextField();
    userNameField.setBounds(200,85,130,25);
    frame.getContentPane().add(userNameField);
    userNameField.setColumns(10);

    JLabel password = new JLabel("Password");
    password.setBounds(75, 135, 60, 15);
    frame.getContentPane().add(password);

    passwordField = new JPasswordField();
    passwordField.setBounds(200,135,130,15);
    frame.getContentPane().add(passwordField);

    JButton btnLogin = new JButton("Login");
    btnLogin.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt) {

            String userName = userNameField.getText();
            String pw = passwordField.getText();

            if (userName.equals("username") && pw.equals("password")) {
                JOptionPane.showMessageDialog(frame, "You have succesfully logined.");
            }
            else {
                JOptionPane.showMessageDialog(frame, "Invalid username or password;");
            }
        }
    });

    btnLogin.setBounds(150, 190, 120, 30);
    frame.getContentPane().add(btnLogin);


    }


    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                try {
                    LoginMain window = new LoginMain();
                    window.frame.setVisible(true);
                }
                catch(Exception e){
                    e.printStackTrace();
                }
            }
        });
    }
}