Dynamic Arrays, Spill, and LET: What Changed in Excel and Why It Matters for Java Applications

In a previous article, Working with Spreadsheets in Java: A Practical Overview , we walked through the common scenarios where Java applications need to interact with spreadsheets and the categories of tools available for the job. One of the factors mentioned there was support for modern Excel formulas — a topic that deserves more space than a single bullet point. Java applications interact with Excel more often than most teams plan for: file uploads from finance, calculation logic authored in a workbook, reporting exports back to business users.