public static void main(String[] args) {
ListNode head1 = new ListNode(1);
head1.setNext(new ListNode(4));
head1.getNext().setNext(new ListNode(5));
head1.getNext().getNext().setNext(new ListNode(7));
System.out.println(head1.detailedToString());
ListNode head2 = new ListNode(0);
head2.setNext(new ListNode(2));
head2.getNext().setNext(new ListNode(4));
head2.getNext().getNext().setNext(new ListNode(8));
System.out.println(head2.detailedToString());
ListNode headAdd = addTwoNumbers(head1, head2);
System.out.println(headAdd.detailedToString());
}
