public static void main(String[] args) {
String s = "123."; //String转BigDecimal BigDecimal big = new BigDecimal(s); System.out.println(big); //123. //BigDecimal转Double保留小数(几个0就是几位小数) String d = new DecimalFormat("#.0000").format(big);//如果没有整数位,则显示 .123 String d2 = new DecimalFormat("0000.0000").format(big);//如果没有整数位,则显示 0000.123 System.out.println(d); //123.9475 System.out.println(d2); //0123.9475 //Double 转 Double保留小数 //String转Double保留小数(四舍五入) String sts = new DecimalFormat(".00").format(Double.parseDouble(s)); String sts1 = new DecimalFormat(".00").format(Double.valueOf(s));//还是调用Double.parseDouble(s) System.out.println(sts); //123.95 System.out.println(sts1); //123.95 //String转Double double std = Double.valueOf(sts); System.out.println(std); //123.95 //String转其他 int in = Integer.valueOf("1"); //1 long lo = Long.valueOf("1"); //1 }
发布者:全栈程序员-站长,转载请注明出处:https://javaforall.net/217110.html原文链接:https://javaforall.net
