保留两位小数
Double totalSaleAmount = 4.174558045899999E7; DecimalFormat df = new DecimalFormat("#.##"); System.out.println("df.format(totalSaleAmount) = " + df.format(totalSaleAmount));
结果图
Double totalSaleAmount = 4.174558045899999E7; DecimalFormat df = new DecimalFormat("#.##"); System.out.println("df.format(totalSaleAmount) = " + df.format(totalSaleAmount));