这段程序错在那里怎么不能运行
import   java.awt.*;
//import   java.applet.*;
import   java.awt.event.*;
import   javax.swing.*;

class   IdentityCard  
{
public   static   void   main(String   args[])  
{
frmMain   f=new   frmMain();
f.setSize(400,300);
f.show();
}
}
class   frmMain   extends   JFrame   implements   ActionListener{

Label   lblTitle,   lblReIdens,   lblSoIdens,   lblBirthDay,   lblSex;
Label   lblMessage,   lblIdResult,   lblBirResult,   lblSexResult;
final   int   v_List[]   =   {2,4,8,5,10,9,7,3,6,1,2,4,8,5,10,9,7};
Button   workButton,   resetButton;
int[]   tailList   =   new   int[17];
TextField   txtIdentity   =   null;
Panel   disPanel   =   null;
Label   lblReset;
int   num;

  frmMain(){
this.setFont(new   Font( "Georgia ",   Font.BOLD,   20));
this.setBackground(Color.LIGHT_GRAY);
this.setLayout(new   GridLayout(1,1));

lblTitle   =   new   Label( "身份证号码15位到18位转换 ");
lblTitle.setBounds(70,   10,   260,   20);

lblReIdens   =   new   Label( "15位身份证号: ");
lblReIdens.setBounds(10,   40,   140,   20);
txtIdentity   =   new   TextField( " ",   100);
txtIdentity.setBounds(165,   38,   210,   22);

lblSoIdens   =   new   Label( "18位身份证号: ");
lblSoIdens.setBounds(10,   70,   140,   20);
lblIdResult   =   new   Label( " ");
lblIdResult.setBounds(160,   68,   210,   22);

lblBirthDay   =   new   Label( "出生日期: ");
lblBirthDay.setBounds(53,   100,   95,   20);
lblBirResult   =   new   Label( " ");
lblBirResult.setBounds(160,   98,   200,   22);

lblSex   =   new   Label( "性别: ");
lblSex.setBounds(94,   130,   60,   20);
lblSexResult   =   new   Label( " ");
lblSexResult.setBounds(160,   128,   50,   22);

lblMessage   =   new   Label( " ",Label.CENTER);
lblMessage.setBounds(10,   160,   380,   22);
lblMessage.setForeground(Color.MAGENTA);

workButton   =   new   Button( "转换 ");
workButton.addActionListener(this);
workButton.setBounds(140,   190,   50,   22);
workButton.setBackground(Color.LIGHT_GRAY);

resetButton   =   new   Button( "重置 ");
resetButton.addActionListener(this);
resetButton.setBounds(205,   190,   50,   22);
resetButton.setBackground(Color.LIGHT_GRAY);

this.add(lblTitle);   this.add(lblReIdens);
this.add(txtIdentity); this.add(lblSoIdens);
this.add(lblBirthDay); this.add(lblSex);
this.add(lblIdResult); this.add(lblBirResult);
this.add(lblSexResult); this.add(lblMessage);
this.add(workButton); this.add(resetButton);
}

public   void   actionPerformed(ActionEvent   e){
if(e.getSource()   ==   workButton){
checkIdentity();
doConverte();
}else{
clearContent();
txtIdentity.setText( " ");
lblMessage.setText( "请重新输入! ");