//设计登陆窗口界面

//设计登陆窗口界面
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class jiemianjishijian extends JFrame implements ActionListener {
JLabel lzc, ltx, lbconfirm;
// 声明帐号、密码、确认标签组件
JPasswordField pf;// 声明输入密码框组件
JTextField tfzh;
// 声明输入帐号文本框组件
JButton btLogin;// 声明登陆按钮组件
String zhanghao;// 声明变量账号
String mima;// 声明变量密码

jiemianjishijian() {
JFrame jf = new JFrame("登陆窗口");
jf.setVisible(true); // 设置窗体可见
jf.setSize(400, 200);// 设置窗口初显大小
jf.setLocationRelativeTo(null);

JPanel jp = new JPanel();
jp.setLayout(new BorderLayout(5, 5));// 构造一个边界布局

JPanel jpTop = new JPanel();
jpTop.setLayout(new GridLayout(2, 2, 5, 5));

JPanel jpInfo = new JPanel();
jpInfo.setLayout(new FlowLayout());

JPanel jpbtLogin = new JPanel();
jpbtLogin.setLayout(new FlowLayout());

lzc = new JLabel("帐号", lzc.CENTER);// 创建组件并赋值
ltx = new JLabel("密码", ltx.CENTER);
lbconfirm = new JLabel(" ");

tfzh = new JTextField(15);
pf = new JPasswordField(15);

btLogin = new JButton("登陆");
btLogin.addActionListener(this);

jpTop.add(lzc);// 把组件添加到面板上
jpTop.add(tfzh);
jpTop.add(ltx);
jpTop.add(pf);
jpInfo.add(lbconfirm);
jpbtLogin.add(btLogin);
jp.add(jpTop, BorderLayout.NORTH);
jp.add(jpInfo, BorderLayout.CENTER);
jp.add(jpbtLogin, BorderLayout.SOUTH);

jf.add(jp);

}

public void actionPerformed(ActionEvent e) {
zhanghao = tfzh.getText();
mima = pf.getText();

if (zhanghao.equals("lvtongxue") && mima.equals("5824634"))
lbconfirm.setText("登录成功");
else
lbconfirm.setText("帐号或密码有误，请重新输入");
}

public static void main(String[] args) {
new jiemianjishijian();
}

}