学习中遇到的一点小问题

[code][code]import java.math.BigDecimal;

public class AccuratelyFloat {
    public static void main(String[] args){
        double money = 2;
        double price = 1.1;
        double result = money - price;
        System.out.println("非精确计算");
        System.out.println("剩余金额" + result);
        BigDecimal money1 = new BigDecimal("2");
        BigDecimal price1 = new BigDecimal("1.1");
        BigDecimal result1 = money1.subtract(price1);
        System.out.println("精确计算");
        System.out.println("剩余金额" + result);
    }
}