java弹出式小程序

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

public class textFrame extends JFrame {
    public textFrame() {
        super("Title Frame");
        setSize(300, 200);
        JLabel username=new JLabel("username: ",SwingConstants.RIGHT);
        JLabel passWord=new JLabel("password: ",SwingConstants.RIGHT);
        JTextField text=new JTextField(10);
        JTextField password=new JTextField(10);
        JPanel pane=new JPanel();
        pane.setLayout(new GridLayout(2,2));
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        String response1 = JOptionPane.showInputDialog(null,
        "username:");
        String response2=JOptionPane.showInputDialog(null,"passwrod:");
        text.setText(response1);
        password.setText(response2);
        pane.add(username);
        pane.add(text);
        pane.add(passWord);
        pane.add(password);
        setContentPane(pane);
        setVisible(true);
    }

    public static void main(String[] arguments) {
        JFrame frame = new textFrame();
    }
}