Java IndexOutOfBoundsException: Accessing Empty ArrayList in "main" Thread

The main cause of the exception is an IndexOutOfBoundsException. This means that the code is trying to access an element in an ArrayList at an index that is out of bounds. \n\nIn this specific case, the code is trying to access the element at index 0 in an ArrayList, but the ArrayList is empty (size 0). Hence, the index is out of bounds.\n\nTo fix this issue, you need to ensure that the ArrayList is not empty before trying to access its elements. You can use the size() method to check the size of the ArrayList before accessing its elements.