精通JTable的高手请出手！

Question

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
public class LockColumn extends JFrame
{
   class SharedModel extends AbstractTableModel{
       public int getRowCount(){return 10;}
       public int getColumnCount(){return 10;}
       public Object getValueAt(int r,int c){
           return "("+r+","+c+")";
       }
   }
   TableModel sharedModel=new SharedModel();
   JTable table=new JTable(sharedModel),
          headerTable=new JTable(sharedModel);
   TableColumnModel tcm=table.getColumnModel();
   TableColumn firstColumn=tcm.getColumn(0);
   public LockColumn(){
       setSize(600,480);
       Container cp=getContentPane();
       table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
       headerTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
       headerTable.getTableHeader().setReorderingAllowed(false);
       headerTable.setPreferredScrollableViewportSize(
         new Dimension(firstColumn.getPreferredWidth()+headerTable.getColumnModel().getColumnMargin(),0));
       cp.add(new ControlPane(),BorderLayout.NORTH);
       cp.add(new JScrollPane(table),BorderLayout.CENTER);        
   }
   public static void main(String argv[]){
       new LockColumn().show();
   }
   class ControlPane extends JPanel{
       JCheckBox checkBox=new JCheckBox("First Column Locked");
       public ControlPane(){
           add(checkBox);
           checkBox.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent e){
                   JScrollPane scrollPane=(JScrollPane)SwingUtilities.getAncestorOfClass(JScrollPane.class,table);
                   if(checkBox.isSelected()){
                       tcm.removeColumn(firstColumn);
                       scrollPane.setRowHeaderView(headerTable);
                       scrollPane.setCorner(JScrollPane.UPPER_LEFT_CORNER,headerTable.getTableHeader());
                   }else{
                       tcm.addColumn(firstColumn);
                       int numCols=tcm.getColumnCount();
                       tcm.moveColumn(numCols-1,0);
                       scrollPane.setRowHeaderView(null);
                   }
                   table.revalidate();            
               }
           });
       }
   }
}
//来自于java核心技术 duoshan&2003.8.25