package com.by4cloud.platformx.device.util;
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import java.math.BigDecimal;
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/**
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* @author xfei
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* @date 2022/5/27下午8:26
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*/
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public class NumUtils {
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/**
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* 精确小数
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* @param f 小数
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* @param length 精确位数
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* @return
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*/
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public static Float accurateFloat(Float f,int length){
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BigDecimal b = new BigDecimal(f.toString());
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f = b.setScale(length,BigDecimal.ROUND_HALF_UP).floatValue();
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return f;
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}
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public static Float accurateFloat(Float f){
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return accurateFloat(f,3);
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}
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public static Double accurateFloat(Double f,int length){
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BigDecimal b = new BigDecimal(f.toString());
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f = b.setScale(length,BigDecimal.ROUND_HALF_UP).doubleValue();
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return f;
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}
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public static Double accurateFloat(Double f){
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return accurateFloat(f,3);
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}
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public static Double accurateDouble(Double f,int length){
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if(f==null){
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f=0d;
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}
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BigDecimal b2 = new BigDecimal(f.toString());
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f = b2.setScale(length,BigDecimal.ROUND_HALF_UP).doubleValue();
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return f;
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}
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public static Double accurateDouble(Double f){
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return accurateDouble(f,3);
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}
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/**
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* 加
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* @param a
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* @param b
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* @return
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*/
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public static Double addDouble(Double a,Double b){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.add(bb);
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aa = aa.setScale(2,BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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public static Double addDoubles(Double ... a){
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Double result = 0d;
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for (Double d :a){
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result =addDouble(result,d);
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}
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return result;
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}
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public static Double addDoubles(int len,Double ... a){
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Double result = 0d;
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for (Double d :a){
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result =addDouble(result,d,len);
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}
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return result;
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}
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/**
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* 减
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* @param a
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* @param b
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* @return
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*/
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public static Double subtractDouble(Double a,Double b){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.subtract(bb);
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aa = aa.setScale(2,BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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/**
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* 减 只舍不入
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* @param a
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* @param b
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* @return
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*/
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public static Double subtractDoubleDown(Double a,Double b){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.subtract(bb);
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aa = aa.setScale(2,BigDecimal.ROUND_DOWN);
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return aa.doubleValue();
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}
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/**
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* 乘
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* @param a
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* @param b
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* @return
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*/
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public static Double multiplyDouble(Double a,Double b){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.multiply(bb);
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aa = aa.setScale(2,BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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/**
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* 乘 只舍不入
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* @param a
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* @param b
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* @return
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*/
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public static Double multiplyDoubleDown(Double a,Double b){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.multiply(bb);
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aa = aa.setScale(2,BigDecimal.ROUND_DOWN);
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return aa.doubleValue();
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}
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/**
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* 除
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* 除法
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* @param a
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* @param b
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* @return
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*/
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public static Double divideDouble(Double a,Double b){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.divide(bb);
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aa = aa.setScale(2,BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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public static Double divideDoubleUp(Double a,Double b){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.divide(bb,BigDecimal.ROUND_HALF_UP);
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aa = aa.setScale(2,BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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/**
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* 除
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* 除法
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* @param a
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* @param b
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* @return
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*/
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public static Double divideDoubleDown(Double a,Double b){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.divide(bb);
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aa = aa.setScale(2,BigDecimal.ROUND_DOWN);
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return aa.doubleValue();
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}
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/**
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* 加
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* @param a
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* @param b
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* @return
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*/
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public static Double addDouble(Double a,Double b,int len){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.add(bb);
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aa = aa.setScale(len,BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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/**
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* 减
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* @param a
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* @param b
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* @return
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*/
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public static Double subtractDouble(Double a,Double b,int len){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.subtract(bb);
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aa = aa.setScale(len,BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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/**
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* 乘
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* @param a
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* @param b
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* @return
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*/
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public static Double multiplyDouble(Double a,Double b,int len){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.multiply(bb);
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aa = aa.setScale(len,BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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/**
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* 除
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* @param a
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* @param b
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* @return
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*/
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public static Double divideDouble(Double a,Double b,int len){
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if (a==null)a=0d;
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if (b==null)b=0d;
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BigDecimal aa = new BigDecimal(a+"");
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BigDecimal bb = new BigDecimal(b+"");
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aa = aa.divide(bb,len, BigDecimal.ROUND_HALF_UP);
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return aa.doubleValue();
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}
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public static Double floatToD(Float f){
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if (f==null){
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return new Double(0);
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}
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return new Double(f);
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}
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public static void main(String[] args) {
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// System.out.println(NumUtils.accurateDouble(60.1575,3));
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System.out.println(NumUtils.addDoubles(6.1234d,6.1234d,4.33d));
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}
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}
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