Merging Cells with different row height

Hi to All,

I have got 2 applications from Java Codeguru site namely;

Make a cell span multiple cells (Nobuo Tamemasa)
Changing height of individual row (Zafir Anjum)

I want to merge cells with different row height in a single JTable
application. But I am finding it quite difficult to manage it.
Both of these examples have over-ridden same methods in JTable and BasicTableUI.
I have tried some parent child relationship, which didn’t work,
also try to setUI at runtime for different tasks, which failed too.
It will be great if someone can provide few pointers for
handling this.

Thanks in advance.