Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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### Java PriorityQueue Method Behaviors In this section, we analyze whether specific methods in the `java.util.PriorityQueue<E>` class return an exception, null, or false when executed. Below are the methods under consideration: a) **offer()** &nbsp;&nbsp;&nbsp;&nbsp;The `offer()` method inserts the specified element into the priority queue if possible. If successful, it returns `true`. If the element cannot be added, due for example to capacity restrictions, it returns `false`. It does not throw an exception in normal operation. b) **peek()** &nbsp;&nbsp;&nbsp;&nbsp;The `peek()` method retrieves, but does not remove, the head of this queue, or returns `null` if this queue is empty. It does not throw an exception. c) **remove()** &nbsp;&nbsp;&nbsp;&nbsp;The `remove()` method removes a single instance of the specified element from this queue, if it is present. If the element is not present, the method's behavior depends on the case of a queue being empty or not containing the specified element. It can throw a `NoSuchElementException` if the queue is empty. d) **element()** &nbsp;&nbsp;&nbsp;&nbsp;The `element()` method retrieves, but does not remove, the head of this queue. However, unlike `peek()`, it throws a `NoSuchElementException` if this queue is empty. e) **poll()** &nbsp;&nbsp;&nbsp;&nbsp;The `poll()` method retrieves and removes the head of this queue, or returns `null` if this queue is empty. It does not throw an exception.
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Transcribed Image Text:### Java PriorityQueue Method Behaviors In this section, we analyze whether specific methods in the `java.util.PriorityQueue<E>` class return an exception, null, or false when executed. Below are the methods under consideration: a) **offer()** &nbsp;&nbsp;&nbsp;&nbsp;The `offer()` method inserts the specified element into the priority queue if possible. If successful, it returns `true`. If the element cannot be added, due for example to capacity restrictions, it returns `false`. It does not throw an exception in normal operation. b) **peek()** &nbsp;&nbsp;&nbsp;&nbsp;The `peek()` method retrieves, but does not remove, the head of this queue, or returns `null` if this queue is empty. It does not throw an exception. c) **remove()** &nbsp;&nbsp;&nbsp;&nbsp;The `remove()` method removes a single instance of the specified element from this queue, if it is present. If the element is not present, the method's behavior depends on the case of a queue being empty or not containing the specified element. It can throw a `NoSuchElementException` if the queue is empty. d) **element()** &nbsp;&nbsp;&nbsp;&nbsp;The `element()` method retrieves, but does not remove, the head of this queue. However, unlike `peek()`, it throws a `NoSuchElementException` if this queue is empty. e) **poll()** &nbsp;&nbsp;&nbsp;&nbsp;The `poll()` method retrieves and removes the head of this queue, or returns `null` if this queue is empty. It does not throw an exception.
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