| .. | ||
| CircularQueue.java | ||
| GenericArrayListQueue.java | ||
| LinkedQueue.java | ||
| PriorityQueues.java | ||
| Queues.java | ||
| README.md | ||
Queue
- The Queue interface is present in the
java.utilpackage. - It is an ordered list of objects that follows the FIFO (First-In-First-Out) principle.
Characteristics of a Queue
- The Queue is used to insert elements at the end of the queue and removes elements from the beginning of the queue.
- It supports all methods of Collection interface including insertion, deletion etc.
- LinkedList, ArrayBlockingQueue and PriorityQueue are the most commonly used implementations.
Declaration
Queue<Obj> queue = new PriorityQueue<Obj> ();
Important operations
| Operations | Description |
|---|---|
| Enqueue | Adds an item to the queue |
| Dequeue | Removes an item from the queue |
| Front | Gets the front item from the queue |
| Rear | Gets the last item from the queue |