请教一个Java的Swing技术问题.

高手，我弄了一个Java的Swin类型，源代码如下：

import java.awt.Component;

import java.awt.Rectangle;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;

import java.io.File;

import java.net.URL;

import java.util.Enumeration;

import java.util.HashMap;

import java.util.List;

import java.util.Map;



import javax.swing.Icon;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JComponent;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTable;

import javax.swing.Timer;

import javax.swing.UIManager;

import javax.swing.table.DefaultTableCellRenderer;

import javax.swing.table.DefaultTableModel;

import javax.swing.table.JTableHeader;

import javax.swing.table.TableColumn;



public class TableCellRenderer8 extends JPanel implements ItemListener,

		ActionListener {

	public TableCellRenderer8() {

		jb.addActionListener(this);

	}



	StringBuffer choice;

	JButton jb = new JButton();

	JFrame jf = new JFrame("使用单元格绘制器");

	JTable table;

	// 定义二维数组作为表格数据

	Object[][] tableData = {};



	public static HashMap<String, Object[]> tableList = new HashMap<String, Object[]>() {

		/**

	 *

	 */

		private static final long serialVersionUID = 1L;



		{

			for (int i = 0; i < 100; i++) {

				put(String.valueOf(i), new Object[] { "王二小" + i, 29,

						new ImageIcon("icon/male.png"),

						new ImageIcon("icon/3.gif"), true });



			}

		}

	};



	public void addData2table(String username, String place, Integer sex,

			boolean isFull) {

		ImageIcon sexicon = new ImageIcon("icon/male.png");

		if (sex == 0) {// 女

			sexicon = new ImageIcon("icon/female.png");

		}

		Object[] row = new Object[] { username, place, sexicon, new TimeLabel(),

				isFull };

		// tableList.put(DRecv.BJMemUID[myuserIndex],list);

		((DefaultTableModel) table.getModel()).insertRow(0, row);// 加入空行

		this.FitTableColumns(this.table);

	}



	public void removedata2table(List<Object[]> list) {

		int i = 0;

		

		// for(int j = 0;j<tableList.size();i++){

		// if(tableList.get(i).

		//

		//

	}



	public Object[][] toArray(Map<String, Object[]> map) {

		Object[][] objs = null;

		if (map == null || map.isEmpty()) {

			return objs;

		}

		Object[] o = map.keySet().toArray();

		objs = new Object[o.length][];

		for (int i = 0; i < o.length; i++) {

			objs[i] = map.get(o[i]);

		}

		return objs;

	}



	// public void addData2table(Object[][] str){

	// tableData[][tableData.length] = str[][tableData.length];

	// }

	//

	// 定义一维数据作为列标题

	String[] columnTitle0 = {"  员工姓名    " , "    员工毕业院校     " , "   员工性别    " , "    员工本单维护时间       " , "订单状态"};



	public void init() {

		// 以二维数组和一维数组来创建一个ExtendedTableModel对象

		ExtendedTableModel8 model = new ExtendedTableModel8(columnTitle0, null);

		// 以ExtendedTableModel来创建JTable

		table = new JTable(model);

		table.setRowSelectionAllowed(false);

		table.setRowHeight(40);

		// 获取第三列

		// table.setDefaultRenderer(Object.class, new

		// GenderTableCellRenderer());

		// table.getColumnModel().getColumn(4)

		// .setCellEditor(new DefaultCellEditor(new JCheckBox()));

		table.getColumnModel().getColumn(2)

				.setCellRenderer(new GenderTableCellRenderer8());



		table.getColumnModel().getColumn(3)

				.setCellRenderer(new GenderTableCellRenderer8());

		// 将JTable对象放在JScrollPane中，并将该JScrollPane放在窗口中显示出来

		jf.add(new JScrollPane(table));

		FitTableColumns(table);

		jf.setBounds(new Rectangle(100, 100, 800, 600));

		// jf.pack();

		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		jf.setVisible(true);

		Timer timer = new Timer(100, new ActionListener() {

			public void actionPerformed(ActionEvent e) {

				table.updateUI();

			}

		});

		timer.start();

	}



	public void FitTableColumns(JTable myTable) {

		JTableHeader header = myTable.getTableHeader();

		int rowCount = myTable.getRowCount();

		Enumeration columns = myTable.getColumnModel().getColumns();

		while (columns.hasMoreElements()) {

			TableColumn column = (TableColumn) columns.nextElement();

			int col = header.getColumnModel().getColumnIndex(

					column.getIdentifier());

			// 取得表头宽度,然后和内容宽度进行逐一比较,取最大者,如果不想表格宽度随表头变化的话就将下面的width设为0

			int width = (int) myTable

					.getTableHeader()

					.getDefaultRenderer()

					.getTableCellRendererComponent(myTable,

							column.getIdentifier(), false, false, -1, col)

					.getPreferredSize().getWidth();

			for (int row = 0; row < rowCount; row++) {

				int preferedWidth = (int) myTable

						.getCellRenderer(row, col)

						.getTableCellRendererComponent(myTable,

								myTable.getValueAt(row, col), false, false,

								row, col).getPreferredSize().getWidth();

				width = Math.max(width, preferedWidth);

			}

			header.setResizingColumn(column); // 此行很重要

			column.setWidth(width + myTable.getIntercellSpacing().width);

		}

	}

	

	



	public static void main(String[] args) {

		TableCellRenderer8 re8 = new TableCellRenderer8();

		re8.init();

		for(int I =0;I<20;I++){

		re8.addData2table("CJCO"+I, "3", 0, false);

		}

		

		try {

			Thread.sleep(10000);

		} catch (InterruptedException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		re8.addData2table("CJCO！！！！","北京邮电大学",0,true);

	}



	// @Override

	// public void itemStateChanged(ItemEvent e) {

	// // TODO Auto-generated method stub

	// //获取改变的复选按键

	// Object source = e.getItemSelectable();

	// int index = -1;

	// char c = '-';

	// if (source==chin) {

	// index = 0;

	// c = 'c';

	// } else if(source == glass){

	// index = 1;

	// c = 'g';

	// }else if(source == hire){

	// index = 2;

	// c = 'h';

	// }else if(source == teeth)

	// {

	// index = 3;

	// c = 't';

	// }

	//

	// //判断改变的按键的改变后的状态

	// if(e.getStateChange() == ItemEvent.DESELECTED)

	// c = '-';

	//

	//

	// choice.setCharAt(index, c);

	//

	// upDatePicture();

	// }



	public static void createAndShowGUI() {

		JFrame frame = new JFrame("复选框测试");

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);



		JComponent panel = new TableCellRenderer8();



		frame.add(panel);

		frame.pack();

		frame.setLocationRelativeTo(null);

		frame.setVisible(true);



	}



	private ImageIcon createImageIcon(String string) {

		URL url = TableCellRenderer8.class.getResource(string);

		if (url != null)

			return new ImageIcon(url);

		else

			System.out.println("image " + string + "not exist!");

		return null;

	}



	private void upDatePicture() {

		ImageIcon ii = createImageIcon(File.separator + "images"

				+ File.separator + "geek" + File.separator + "geek-"

				+ choice.toString() + ".gif");

	}



	@Override

	public void itemStateChanged(ItemEvent e) {

		// TODO Auto-generated method stub



	}



	@Override

	public void actionPerformed(ActionEvent e) {

		// TODO Auto-generated method stub



	}

}



class ExtendedTableModel8 extends DefaultTableModel {

	/**

  *

  */

	private static final long serialVersionUID = 1L;



	// 重新提供一个构造器，该构造器的实现委托给DefaultTableModel父类

	public ExtendedTableModel8(String[] columnNames, Object[][] cells) {

		super(cells, columnNames);

	}



	// // 重写getColumnClass方法，根据每列的第一个值来返回其真实的数据类型

	public Class getColumnClass(int c) {

		return getValueAt(0, c).getClass();

	}

}



class GenderTableCellRenderer8 extends DefaultTableCellRenderer {

	/**

	 * 

	 */

	private static final long serialVersionUID = 1L;

	private String cellValue;

	// 定义图标的宽度和高度

	final int ICON_WIDTH = 23;

	final int ICON_HEIGHT = 21;



	public Component getTableCellRendererComponent(JTable table, Object value,

			boolean isSelected, boolean hasFocus, int row, int column) {

		if (value instanceof Icon) {

			this.setIcon((Icon) value);

		} else if (value instanceof String) {

			this.setText((String) value);

		} else if (value instanceof TimeLabel) {

			return (Component) value;

		}

		// 设置选中状态下绘制边框

		if (hasFocus) {

			setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));

		} else {

			setBorder(null);

		}

		return this;

	}



	// // 重写paint方法，负责绘制该单元格内容

	// public void paint(Graphics g) {

	// // 如果表格值为"男"或"male"，则绘制一个男性图标

	// if (cellValue.equalsIgnoreCase("男")

	// || cellValue.equalsIgnoreCase("male")) {

	// drawImage(g, new ImageIcon("icon/male.gif").getImage());

	// }

	// // 如果表格值为"女"或"female"，则绘制一个女性图标

	// if (cellValue.equalsIgnoreCase("女")

	// || cellValue.equalsIgnoreCase("female")) {

	// drawImage(g, new ImageIcon("icon/female.gif").getImage());

	// }

	// }



	// 绘制图标的方法

	// private void drawImage(Graphics g, Image image) {

	// g.drawImage(image, (getWidth() - ICON_WIDTH) / 2,

	// (getHeight() - ICON_HEIGHT) / 2, null);

	// }



}

上述代码运行结果如下：

我希望能够把上面的运行效果中的第3列”员工性别“和第4列”员工本单维护时间“之间，添加一个”员工擅长方向“的ＪＴａｂｌｅ列。
　　并且，能够让小弟的可以在本列位置添加一个String类型的数据，让用户能够得到”自己的员工擅长方向“的总览管理。
希望高手能够指教：
上面的需求，小弟的代码要怎么修改，能够完成客户的要求？
谢谢伟大的Swing，伟大的高手，伟大的CSDN，伟大的CSDN共享精神！！