private Double scientDouble; public Double getScientDouble() { return scientDouble; } public void setScientDouble(Double scientDouble) { this.scientDouble = scientDouble; } /** * @description:给Double类型赋值过大,或者过小时产生科学计数法. * 把科学计数法转换成浮点数表示 * @author: * @date: 2019/8/21 * @param null: * @return: */ public static String scientificCountToFloat(Double scientStr){ System.out.println(scientStr); String str[]=scientStr.toString().split("-"); for (int i = 0; i <str.length ; i++) { System.out.println(str[i]); } NumberFormat nf = NumberFormat.getInstance(); //设置小数位数,通过算出科学计数法的小数位数,然后设置小数位数 if (str.length>1){ nf.setMaximumFractionDigits(Integer.valueOf(str[1])); } //取消科学计数法 nf.setGroupingUsed(false); return nf.format(scientStr); } public static void main(String[] args) { MathUtil mathUtil=new MathUtil(); mathUtil.setScientDouble(0.00000000000000000001); System.out.println(scientificCountToFloat(mathUtil.getScientDouble());); }
原文地址:https://www.cnblogs.com/cyoba/p/11399352.html
时间: 2024-10-02 18:25:04