如何在Java中将BigDecimal乘以整数 [英] How to multiply a BigDecimal by an integer in Java

问题描述

如何在Java中将BigDecimal乘以整数？我试过这个但不正确。

How do you multiply a BigDecimal by an integer in Java? I tried this but its not correct.

import java.math.BigDecimal;
import java.math.MathContext;

public class Payment {
    int itemCost;
    int totalCost = 0;

    public BigDecimal calculateCost(int itemQuantity,BigDecimal itemPrice){
        itemCost = itemPrice.multiply(itemQuantity);
        totalCost = totalCost + itemCost;
    return totalCost;
   }

推荐答案

你有很多<您的代码中的em> type-mismatches ，例如尝试放置 int 值，其中 BigDecimal 是必需的。更正后的代码版本：

You have a lot of type-mismatches in your code such as trying to put an int value where BigDecimal is required. The corrected version of your code:

public class Payment
{
    BigDecimal itemCost  = BigDecimal.ZERO;
    BigDecimal totalCost = BigDecimal.ZERO;

    public BigDecimal calculateCost(int itemQuantity, BigDecimal itemPrice)
    {
        itemCost  = itemPrice.multiply(new BigDecimal(itemQuantity));
        totalCost = totalCost.add(itemCost);
        return totalCost;
    }
}

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