java.lang.ArithmeticException: / by zero

Question

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

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

why is this happening?

Answer 1

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 .

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