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- /* Add new item to the back of the queue */
- public void enqueue(Data item) {
- Node<Data> newNode = new Node<>(); // 1
- newNode.data = item; // 1
- if (isEmpty()) { // 2
- head = tail = newNode; // 2
- } else {
- tail.next = newNode; // 3
- tail = newNode; // 4
- }
- size++; // 5
- }
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