- The Queue interface is present in the `java.util` package.

- It is an ordered list of objects that follows the **FIFO** (First-In-First-Out) principle.

- 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.

`Queue<Obj> queue = new PriorityQueue<Obj> ();`

| 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|