I don't remember which ones I used, but those are the ones which were in the library when it worked. According to the code below, you will want to put those in "lib/java_classes." However, you can put them wherever.
The code below outputs the Excel spreadsheet as an array:
There is a flaw to this code above: an Excel sheet needs to be "cleaned" prior to importing. Excel files typically get tons of extra rows and tons of extra columns associated with the Active Cells. People apply formatting to unused areas by selecting all, etc. Therefore, go in and delete unused cells, and do "Save As" to get Excel to forget formatting on those cells.
To run the code above, do the following: