Over the past two months, I have presented several articles on using RPG and Java to create Excel spreadsheets. I've explained how to create sheets, rows, and cells and have explained many different things that can be done with cell styles. This article explains another useful capability of HSSF, how to read and modify an existing spreadsheet. If you think about it, most of what I demonstrated in the past articles were things that happened in memory. You'd create a new ...

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