Write Double value in numeric cell with specific format in Apache Poi 3.7

Question

I need to write a Double value in a numeric cell using a specific format, i mean, the generated xls must have numeric cells containing Double values like, for example: 8,1.

Answer 1

I tried this working fine...

HSSFCellStyle cellStyle = wb.createCellStyle();
HSSFDataFormat hssfDataFormat = wb.createDataFormat(); 
String cellVal = "2500";
cellStyle.setDataFormat(hssfDataFormat.getFormat("#,##0.000"));
newCell.setCellStyle(cellStyle);
newCell.setCellValue(new Double(cellVal));
newCell.setCellType(Cell.CELL_TYPE_NUMERIC);

The output is a numeric value with desired format: 2,500.000