import java.math.BigDecimal;import java.util.Scanner;/** * Created by Administrator on 2016/9/20. */public class BigDecimalGetNumbers {    public static void main(String args[]) {        Scanner in = new Scanner(System.in);        double dInput = in.nextDouble();        long longPart = (long) dInput;        BigDecimal bigDecimal = new BigDecimal(Double.toString(dInput));        BigDecimal bigDecimalLongPart = new BigDecimal(Double.toString(longPart));        double dPoint = bigDecimal.subtract(bigDecimalLongPart).doubleValue();        System.out.println("整数部分为:" + longPart + "\n" + "小数部分为: " + dPoint);    }}

1.234567E4整数部分为:12345小数部分为: 0.67Process finished with exit code 0