花了点时间写了一个简单的页面：

package test;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class UserInterface extends JFrame implements WindowListener{

JFrame jf;

JPanel jpan1,jpan2,jpan3;

JLabel username,password,lspace;

JTextField user,pass;

JButton login,register;

public void go(){

jf=new JFrame("UserInterface");

jf.setSize(350, 250);

jf.setResizable(false);

jf.setLayout(new GridLayout(6,1,0,5));

jpan1=new JPanel();

jpan2=new JPanel();

jpan3=new JPanel();

username=new JLabel("Username");

password=new JLabel("Password");

user=new JTextField(12);

pass=new JTextField(12);

login=new JButton("Login");

register=new JButton("Register");

jpan1.setSize(200, 50);

jpan1.add(username);

jpan1.add(user);

jpan2.setSize(200, 50);

jpan2.add(password);

jpan2.add(pass);

jpan3.setLayout(new FlowLayout(FlowLayout.CENTER,20,0));

jpan3.add(login);

jpan3.add(register);

lspace=new JLabel();

jf.add(lspace);

jf.add(jpan1);

jf.add(jpan2);

lspace=new JLabel();

jf.add(lspace);

jf.add(jpan3);

lspace=new JLabel();

jf.add(lspace);

jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

jf.setVisible(true);

}

public static void main(String[] args){

UserInterface ui=new UserInterface();

ui.go();

}

public void windowDeactivated(WindowEvent e){

}

@Override

public void windowActivated(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowClosed(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowClosing(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowDeiconified(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowIconified(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowOpened(WindowEvent arg0) {

// TODO Auto-generated method stub

}

}