Mar 25, 2009 · When using a capacity-restricted queue, offer () is generally preferable to add (), which can fail to insert an element only by throwing an exception. And PriorityQueue is an …

Jan 4, 2013 · For Java 8, updating on an existing answer: You can use Java Priority Queue as a Heap. Min Heap: --> to keep the min element always on top, so you can access it in O (1). …

Oct 9, 2020 · That is your comparator, to wit, a lambda expression which implements a Comparator<T>, and which you pass as an argument into your priority queue constructor. …

Jul 7, 2020 · Priority Queue of an array of integers in java Asked 5 years, 3 months ago Modified 1 year, 7 months ago Viewed 26k times

Jan 31, 2020 · A priority queue relying on natural ordering also does not permit insertion of non-comparable objects (doing so may result in ClassCastException). The head of this queue is …

How do I make the print_queue work properly in Java? This is my own implementation of a queue. Using Iterator() works fine, except it prints numbers in random order. package …

I have priority queue in Java of Integers: PriorityQueue<Integer> pq= new PriorityQueue<Integer>(); When I call pq.poll() I get the minimum element. Question: how to …

Currently, there are about 200k items in that queue which is pretty much memory intesive. Acutally, I only need lets say the best 1000 or 100 of all items in the list. So I just started to ask …

May 15, 2012 · 2 If you look at the first line in the documentation you'll see: An unbounded priority queue based on a priority heap. You can't use a priority heap to find the index of an element …

This can be achieved easily, but the objects class variables (with which the comparator calculates priority) may change after the initial insertion. Most people have suggested the simple solution …