题目：
源代码：
package cn.whpu.action;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Email extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
//声明邮件地址、密码、确认密码、手机号码提示文字对应的标签组件
JLabel labEmail, labPassword, labConfirmPass, labTel;
//声明输入邮件地址、手机号码的文本框组件
JTextField txtEmail, txtTel;
//声明输入密码、确认密码的密码框组件
JPasswordField txtPassword, txtConfirmPass;
//声明立即注册的按钮组件
JButton btnRegister;
//声明一个TextArea组件放到立即注册按钮的下方
JLabel labInfo;
JPanel jpw, jpTop, jpBottom, jpInfo;
/**
* 构造函数
*/
public Email () {
//创建一个显示面板
jpw = new JPanel();
jpw.setLayout(new BorderLayout());
jpTop = new JPanel();
jpTop.setLayout(new GridLayout(4, 2));
jpBottom = new JPanel();
jpBottom.setLayout(new FlowLayout());
jpInfo = new JPanel();
jpInfo.setLayout(new FlowLayout());
//初始化每一个图形化界面中显示的组件
labEmail = new JLabel("邮件地址");
labPassword = new JLabel("密 码");
labConfirmPass = new JLabel("确认密码");
labTel = new JLabel("手机号码");
txtEmail = new JTextField(20);
txtTel = new JTextField(20);
txtPassword = new JPasswordField(20);
txtConfirmPass = new JPasswordField(20);
btnRegister = new JButton("立即注册");
btnRegister.addActionListener(this);
labInfo = new JLabel();
//把需要显示的组件放到显示面板中
jpTop.add(labEmail);
jpTop.add(txtEmail);
jpTop.add(labPassword);
jpTop.add(txtPassword);
jpTop.add(labConfirmPass);
jpTop.add(txtConfirmPass);
jpTop.add(labTel);
jpTop.add(txtTel);
jpBottom.add(btnRegister);
jpInfo.add(labInfo);
jpw.add(jpTop, BorderLayout.NORTH);
jpw.add(jpBottom, BorderLayout.SOUTH);
jpw.add(jpInfo, BorderLayout.CENTER);
//把显示面板添加到窗口中
this.add(jpw);
//设置显示窗口的标题
this.setTitle("Email注册");
//设置显示窗口的最初大小
this.setSize(320, 200);
//设置显示窗口是否显示
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e) {
String txt = "邮箱为：" + txtEmail.getText();
@SuppressWarnings("deprecation")
String pwd = txtPassword.getText();
@SuppressWarnings("deprecation")
String confirmPwd = txtConfirmPass.getText();
if(pwd.equalsIgnoreCase(confirmPwd)) {
labInfo.setText(txt);
} else {
labInfo.setText("密码不正确");
}
}
public static void main(String[] args) {
new Email();
}
}
