关于JTABLE中定制表格的问题---急切

我现在想做一个table格式如下..我改如何做........如何写代码????
           _____________________________________________
           |                 a                         |
           ---------------------------------------------
           |   b    |     c     |    d     |     e     |
           ---------------------------------------------
           | f | 1  | j   |   3 |                      |  
           | h | 2  |     |     |                      |
           ---------------------------------------------
其中abcdefgh 全是列名或行名  123 为数值