“Exception in thread ”main“ java.lang.IndexOutOfBoundsException: Index: 0, Size: 0” with ArrayList?

Question

\"Exception in thread \"main\" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0\" is the main error I get when I compile this method:

public static Arr         


        

Answer 1

Do not use list.set(index, element) on a nonexistent element, since it replaces the old (nonexistent) element with a new one and returns the old one. Instead, use list.add(index, element) and it will work.