How to get the Last cell in HSSFCell (Excel sheet)

Hello
I am trying to convert an excel sheet to a tab limited file.
I am using HSSF and unable to track how do i know if the cell encountered is a last filled cell in excel sheet
Some of the cells in the sheet can be blank. In that case i am just using inputting a '\t' for that cell and read the next one. But coz of this when i get the last cell, a tab is included for that too.
Can someone let me know how can i rectify this?
it seems like HSSFCell does not have any methos like lastCell or so
Thanx

then use getLastCellNum() in org.apache.poi.hssf.usermodel.HSSFRow

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