超级简单的身份证号生日输出

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Choice;
import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.io.IOException;
import java.util.Iterator;

import javax.swing.JFrame;


public class IDCARDDATA extends Frame implements ActionListener
{

/**
*
*/


private TextField CardNum;
private Panel cPanel;
private Label note1;
private Label note2;
private IDCARDDATA Msg;
private Button button_exe;
public IDCARDDATA()
{
   super("信息采集");
   JFrame MsgFrame = new JFrame(); 
   GridLayout Grid12 = new GridLayout(1,2);
   cPanel = new Panel();
   
   button_exe = new Button("查询");
   button_exe.setSize(100, 30);
   CardNum = new TextField(19);
   CardNum.setText("555555198812315555");
   note1   = new Label("请您的输入身份证号：");
   note2   = new Label("此处将显示您想要查询日期的结果。");
   cPanel.add(note1);
   cPanel.add(CardNum);
   cPanel.add(button_exe);
   cPanel.add(note2);
   MsgFrame.addWindowListener(new WinClose());
   button_exe.addActionListener(this);
   MsgFrame.add(cPanel);
   MsgFrame.setSize (620,120);
   MsgFrame.setLocation (300,300);
   MsgFrame.setResizable(false);
   MsgFrame.setVisible(true);
}

public void actionPerformed(ActionEvent e) {
   // TODO Auto-generated method stub
   String CardNO = CardNum.getText();
   String year   = "";
   String month = "";
   String day    = "";
   int    old    = 0;
   String result = "";
 

   if(e.getSource() == button_exe)
   {
    year = CardNO.substring(6,10);
    month = CardNO.substring(10,12);
    day   = CardNO.substring(12,14);
    old   = 2010 - Integer.valueOf(year) + 1;
    if(old < 0)
    {
     result = "输入身份证号有误";
    }  
    else
    {
     result = "年龄："+ old + "岁；" + year + "年" + month + "月" + day + "日出生" ;
    }

    note2.setText(result);
   }
}
public static void main(String arg[])
{
   new IDCARDDATA();
}

class WinClose implements WindowListener
{
   public void windowClosing(WindowEvent e)
   {
         System.exit(0);
   }
   public void windowOpened(WindowEvent e){}
   public void windowActivated(WindowEvent e){}
   public void windowDeactivated(WindowEvent e){}
   public void windowClosed(WindowEvent e){}
   public void windowIconified(WindowEvent e){}
   public void windowDeiconified(WindowEvent e){}
}
}