java.lang.ArithmeticException:/减零 [英] java.lang.ArithmeticException: / by zero

问题描述

我在以下代码行中遇到此错误:

I'm getting this error in this line of code:

for (int i = Math.abs(key.hashCode()) % size; i < size; i++)

为什么会这样?

推荐答案

％运算符在将第一个数字除以第二个数字后返回余数.如果第二个数字(在您的示例中为 size )为零，那么您将得到除以零的 ArithmeticException .

The % operator returns the remainder after dividing the first number by the second number. If the second number (in your example size) is zero, then you will get a divide by zero ArithmeticException.

关键是在执行此循环之前检查 size 是否为零，并采取适当的措施.

The key is to check if size is zero before performing this loop, and take the appropriate action.

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