The add(index, e) method inserts an element into the list at the specified index. It can be implemented as follows:
public void add(int index, E e) {
if (index == 0) addFirst(e); // Insert first
else if (index >= size) addLast(e);// Insert last
else { // Insert in the middle
Node<E> current = head;
for (int i = 1; i < index; i++)
current = current.next;
Node<E> temp = current.next;
current.next = new Node<E>(e);
(current.next).next = temp;
size++;
}
}
Using the above code snippet, your author states that “There are three cases when inserting an element into the list”.
Describe the three cases when inserting an element into the list (Need more than one sentence to describe each case)
ANSWER
While inserting a node to a list, there are 3 possible scenarios:
SCENARIO – 1: Insert at the beginning:
SCENARIO – 2: Insert at the end:
SCENARIO – 3: Insert at the middle (Specified index):
The add(index, e) method inserts an element into the list at the specified index. It can...
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