Was given a buggy implementation of an arraylist and was supposed to test and then fix errors
The changes can be found in MyArrayListWithBugs.java on line 37 and 63.
The problem here was that on line 37 there was checked for if(index <= 0 || nextFree < index) .
This made it impossible to get the first entry in the ArrayList because its starts on 0
The problem here is that after we add an Object to the Array we want to move nextFree up.
this was never done in public void add(int index, Object o) but only in public void add(Object o). So by putting a simple nextFree++ at the end of public void add(int index, Object o) we squashed the bug