Number stored as text warning in excel using POI

Question

I am getting Number stored as text warning for the created excel file using POI. I am trying to display percentage. This question discusses the same, but it's for python. Can some one please suggest me how to avoid this in java using POI?

Below are the lines where I get this warning.

workbook= new XSSFWorkbook();
sh1 = wb.createSheet("Data Sheet");
    cell = row.createCell(3);
    cell.setCellValue(37 + "%");

Based on Gagravarr answer I did it this way.

XSSFDataFormat df = workbook.createDataFormat();
                    CellStyle cs = wb.createCellStyle();
                    cs.setDataFormat(df.getFormat("%"));
                    cell.setCellValue(0.37);
                    cell.setCellStyle(cs);

But it just shows up as 0.37 with no warning now, not 37%.

Answer 1

    if(NumberUtils.isDigits(text)){
        titleCell.setCellValue(Integer.parseInt(text));
    }else{
        titleCell.setCellValue(text);
    }