Array Index Out Of Bounds - Java

Question

I have started to work on my first Java program, which is a simple calculator, however I get an error claiming that my array is out of bounds. I have tried to debug it to see wh

Answer 1

You are only ever adding one item to your list:

currentNum = Double.parseDouble(currentString);
outputNum.add(currentNum);

Then you try to access what seems to be a second object at index operationindex +1 which doesn't exist:

answer = outputNum.get(operationIndex) * outputNum.get(operationIndex+1);