how to save previous hssf cell value inn android studio?

Question

            HSSFWorkbook hssfWorkbook = new HSSFWorkbook();
            HSSFSheet hssfSheet = hssfWorkbook.createSheet();
            HSSFRow hssfRow = hssfSheet.createRow(0);
            HSSFCell hssfCell = hssfRow.createCell(i);
            hssfCell.setCellValue(name.getText().toString());
            

i want to store previous hssf cell value in excel , when i enter new cell value it does,nt store previous hssf cell value...