2.1.4登录界面

import java.awt.*;

import javax.swing.*;

public class QQLogin{

public static void main(String args[]){

JFrame w = new JFrame();

w.setSize(250, 125);

//new 组件

JLabel labUser = new JLabel("用户名");

JLabel labPass = new JLabel("密码");

JTextField txtUser = new JTextField();

JPasswordField txtPass = new JPasswordField();

JButton btnLogin = new JButton("登录");

JButton btnReg = new JButton("注册");

JButton btnCancel = new JButton("取消");

//布置输入面板

JPanel panInput = new JPanel();

panInput.setLayout(new GridLayout(2, 2));

panInput.add(labUser);

panInput.add(txtUser);

panInput.add(labPass);

panInput.add(txtPass);

//布置按钮面板

JPanel panButton = new JPanel();

panButton.setLayout(new FlowLayout());

panButton.add(btnLogin);

panButton.add(btnReg);

panButton.add(btnCancel);

//布置窗体

w.setLayout(new BorderLayout());

w.add(panInput, BorderLayout.CENTER);

w.add(panButton, BorderLayout.SOUTH);

w.setVisible(true);

}

}