java - 创建 equals 方法

Question

根据作业，我必须创建一个名为“equals”的方法来执行以下操作:

The method compares the instance variables of the calling object with instance variables of the parameter object for equality and returns true if the dollars and the cents of the calling object are the same as the dollars and the cents of the parameter object. Otherwise, it returns false.

更新:我犯了一个错误，放错了内容，已更新。出现新错误:

Money.java:115: error: long cannot be dereferenced
  if (dollars.equals(otherObject.dollars) &&
             ^
Money.java:116: error: long cannot be dereferenced
     cents.equals(otherObject.cents))
          ^
2 errors

使用方法:

   public boolean equals(Money otherObject)
{
  boolean status;

  if (dollars.equals(otherObject.dollars) &&
     cents.equals(otherObject.cents))
    return status = true;
  else
    return status = false;
}

Answer 1

dollars 和 cents 是原始 long 类型吗？

如果是的话，您需要使用 (dollars == otherObject.dollars) && (cents == otherObject.cents) 。您无法在基元上调用方法(例如 equals())。