Double型別數值相加導致精度缺失問題

問題描述

        double v1 = 13.01;
        for (int i = 0; i < 10; i++){
            v1 += 13;
            System.out.println(v1);
        }

解決方案

double v1 = 4.5;
double v2 = 4.55;
BigDecimal b1 = new BigDecimal(Double.toString(v1));
BigDecimal b2 = new BigDecimal(Double.toString(v2));
double sum= b1.add(b2).doubleValue();