How to create cells with variable rows in an excel sheet using apache poi

[jyothi nalam]

I am trying to create an excel sheet which has rows that contain cells with different number of rows. to be more clear, i need to create a 4row cell with 5 cells for eg.
first cell need to have 4 rows.
second cell need to have only 2 rows
third cell need to have only 1 row


I am not sure if I am clear enough. i have attached an excel sheet with the kind of formatting I require.

Can someone help me with this problem please.

Thanks in advance.