How to multiply a BigDecimal by an integer in Java

Question

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;    } 

Answer 1

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(BigDecimal.valueOf(itemQuantity));         totalCost = totalCost.add(itemCost);         return totalCost;     } }