package com.pop.practice.homework.utils;
import java.math.BigDecimal;
import java.math.RoundingMode;
/**
* @author haipop Date: 17-2-18 Time: 下午1:00
*/
public class Math {
public static double div(int left, int right) throws IllegalAccessException {
return div((double) left, (double) right, 2);
}
public static double div(int left, int right, int scale) throws IllegalAccessException {
return div((double) left, (double) right, scale);
}
@SuppressWarnings("unchecked")
public static double div(double left, double right, int scale) throws IllegalAccessException {
// 如果精确范围小于0,抛出异常信息
if (scale < 0) {
throw new IllegalAccessException("精确度不能小于0");
}
BigDecimal divisor = new BigDecimal(left);
BigDecimal dividend = new BigDecimal(right);
return divisor.divide(dividend, scale, RoundingMode.HALF_EVEN).doubleValue();
}
}