摘要： public class DoubleTrans{ public static String doubleTrans(double d){ if(Math.round(d)-d==0){ return String.valueOf((long)d); } return String.valueOf(d); } public static void main(String args[]){ double a=3.0d,b=3.1d; System.out.println(doubleTrans(a)); System.out.println(doubleTrans(b)); }... 阅读全文