This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I am using it to generate a Excel spreadsheet. And one feature is to expand\contract rows as groups. The trouble is: I have one overall level, then I want multiple level 2 levels that group the rows. I can't seem to get the numaric combination right. I end up with a single level two grouping that expands between 1 to 10.