Reading 3rd data data from excel using HSSF - selenium

Question

I am trying to read the excel data, there are 2 data exist in the excel but my program is trying to read 3rd data which is null. Can some one please help me on this. below is my code.
public static Object[][] readExcel(String filePath, String sheetName)
throws IOException {
String[][] sheetData = null;
FileInputStream inputStream = new FileInputStream(filePath);
workBook = new HSSFWorkbook(inputStream);
sheet = workBook.getSheet(sheetName);
int k, l;
int rowCount = sheet.getLastRowNum()-sheet.getFirstRowNum();
System.out.println(rowCount);
int readRowCount = sheet.getFirstRowNum();
Row r = sheet.getRow(1);
int totalCol = r.getLastCellNum();
System.out.println(totalCol);
sheetData = new String[rowCount + 1][totalCol];
k = 0;
for (int i = readRowCount + 1; i <= rowCount; i++, k++) {
l = 0;
for (int j = 0; j < totalCol; j++, l++) {
try {
sheetData[k][l] = getCellData(i, j);
System.out.println(sheetData[k][l]);
} catch (Exception e) {
e.printStackTrace();
}
}
}
return (sheetData);
}
public static String getCellData(int RowNum, int ColNum) throws Exception {
try {
Cell = sheet.getRow(RowNum).getCell(ColNum);
String CellData = Cell.getStringCellValue();
return CellData;
} catch (Exception e) {
return "";
}
}
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