Throw ConcurrentModificationException on a best-effort basis. Presence of unsynchronized concurrent modification. Note that the fail-fast behavior of an iterator cannot be guaranteedĪs it is, generally speaking, impossible to make any hard guarantees in the Modification, the iterator fails quickly and cleanly, rather than riskingĪrbitrary, non-deterministic behavior at an undetermined time in the Iterator's own remove method, the iterator will generally throw aĬoncurrentModificationException. printQueue (): Outputs the content of the double-ended. The problem statement goes like this: We need to implement a data structure known as the double-ended priority queue which supports the following methods: add (int x): Insert an element with the value ‘X’ into the double-ended priority queue. The iterator is fail-fast: If the MinMaxPriorityQueue is modifiedĪt any time after the iterator is created, in any way except through the Let us first discuss the problem statement. Returns an iterator over the elements contained in this collection, This class is functionally equivalent to PriorityQueue, but If you only access one end of the queue, and don't use a maximum size,.The AbstractCollection.remove(Object) and ntains() operations require.The enqueing and dequeing operations ( offer(E), add(E), andĪll the forms of poll() and AbstractQueue.remove()) run in.The retrieval operations peek(), peekFirst(), peekLast(), AbstractQueue.element(), and size are constant-time.Double-Ended Queue (Dequeue) Dalam double-ended queue (dequeue), operasi penyisipan dan penghapusan dapat terjadi di ujung depan dan belakang dari queue. This class is not thread-safe, and does not accept null elements. All concrete classes in the Java Collections Framework, with the exception of PriorityQueue are Clonable and Serializable. Aplikasi priority queue antara lain algoritma jalur terpendek Dijkstra, algoritma prim, dan teknik kompresi data seperti kode Huffman. It stores elements in a single array, as compact as the traditional heap data Unlike many other double-ended priority queues, Queues, which either block or reject new elements when full.ĭeveloped by Atkinson, et al. This is different from conventional bounded Dont confuse a dequeue operation with the deque (double-ended queue) data type that youll learn about later. Removes its greatest element according to its comparator (which might be theĮlement that was just added). If so,Įach time the size of the queue exceeds that value, the queue automatically RemoveLast() are also provided, to act on the greatest elementĪ min-max priority queue can be configured with a maximum size. Queue, the methods peekLast(), pollLast() and The queue according to the queue's comparator. Head element - the implicit target of the methods peek(), poll() and AbstractQueue.remove() - is defined as the least element in If no comparator is given at construction time, theĪs a Queue it functions exactly as a PriorityQueue: its Its least element and its greatest element, as determined by the queue's A double-ended priority queue, which provides constant-time access to both
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |