How to get an Excel Blank Cell Value in Apache POI?

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If you want to get all cells, no matter if they exist or not, then the iterator isn’t for you. Instead, you need to manually fetch the appropriate cells, likely with a missing cell policy

for(Row row : sheet) {
   for(int cn=0; cn<row.getLastCellNum(); cn++) {
       // If the cell is missing from the file, generate a blank one
       // (Works by specifying a MissingCellPolicy)
       Cell cell = row.getCell(cn, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
       // Print the cell for debugging
       System.out.println("CELL: " + cn + " --> " + cell.toString());
   }
}

There’s more details on all of this in the Apache POI documentation on iterating over cells

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