fetch excel cell display value using Apache POI

Question

Below shows the highlighted cell which display as - (hyphen) but actually has 0 value inside it.

It's a formula cell with following custom formatting.

It's a formula cell but when the result is 0, it displays as -.

My requirement is to fetch - instead of 0.

cell2Update = sheet.getRow(4).getCell(3);
cell2Update.setCellType(Cell.CELL_TYPE_NUMERIC);
System.out.println(cell2Update.getStringCellValue());//Exception 
System.out.println(cell2Update.getNumericCellValue());//Display as 0

Please help me with this doubt. I want to display the value which is displayed in Spreadsheet (-).

Answer 1

Do using a DataFormatter as shown in Getting the cell contents. And because the value might be result of a formula. Do using using a DataFormatter together with a FormulaEvaluator:

...
DataFormatter formatter = new DataFormatter(); 
FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator(); 
...
cell2Update = sheet.getRow(4).getCell(3);
...
String value = formatter.formatCellValue(cell2Update, evaluator);
System.out.println(value);
...