LoginUI with Event Handling

package kerul.net;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class LoginUI extends JFrame
    implements ActionListener{

    private JTextField username;
    private JPasswordField password;
    private JButton btnlogin, btnreset;
    //private Container pane;

    public LoginUI(){
        username=new JTextField("Username",
                10);
        password=new JPasswordField("Password",
                10);
        btnlogin=new JButton ("Login");
        btnlogin.addActionListener(this);
        btnreset=new JButton ("Reset");
        btnreset.addActionListener(this);

        //draw UIs
        Container pane = getContentPane();
        pane.setBackground(Color.BLUE);
        pane.setLayout(new GridLayout(2,2));
        pane.add(username);
        pane.add(password);
        pane.add(btnlogin);
        pane.add(btnreset);
    }//end constructor

    public void actionPerformed(ActionEvent e){
        Object obj = e.getSource();
        if (obj==btnlogin){
            //capture data username
            String u, p,msg;
            u=username.getText().toString();
            p=password.getText().toString();
            msg="Hello "+u;
            //default title and icon dialog box
            JOptionPane.showMessageDialog(this,
                msg);
        }
        else if(obj==btnreset){
            password.setText("");
            username.setText("Your username here");
            //username.setF
        }
    }//end actionPerformed

    public static void main(String[] args) {
        LoginUI frame = new LoginUI();
        frame.setDefaultCloseOperation(
                JFrame.EXIT_ON_CLOSE);
        frame.setTitle("LoginUI");
        frame.setSize(300, 300);
        frame.setVisible(true);
    }//end main
}//end LoginUI