package com.xzx.gc.common.utils;

import lombok.experimental.UtilityClass;

import java.math.BigDecimal;

@UtilityClass
public class MathUtils {

    /**
     * double减法 保留2位小数
     * @param m1
     * @param m2
     * @return
     */
    public  double subDouble(double m1, double m2) {
        BigDecimal p1 = new BigDecimal(Double.toString(m1));
        BigDecimal p2 = new BigDecimal(Double.toString(m2));
        BigDecimal p3 =p1.subtract(p2);
        return p3.setScale(2, BigDecimal.ROUND_DOWN).doubleValue();
    }
}