The efficient way of declaring PriorityQueue is case 1 which is to declare a priority queue as priorityQueue because it improves code readability and avoids causing errors. In general, the first case should be used to avoid errors. If we use the second case in the usage of priority features then it will produce errors as it will call for prioritization methods. But if our code uses any priority functionalities then we must use the first case instead of the second. In that way, we can change the actual implementation with one line. In many cases, the first case is mostly used but while writing our code if Queue do not use any functionality of prioritization then we can use Queue. Case â 2:Īdvantages: By defining a priority queue as Queue we can change the actual implementation with a single line.Äisadvantages: In some cases, it will generate errors if our code includes priority functionalities where prioritization methods are absent because of declaring the priority queue as Queue. Case â 1:Īdvantages: By declaring the priority queue as priority queue we can quickly access the highest item with a time complexity of just O(1).Äisadvantages: Enqueue and dequeue operations on the priority queue are slow and also have a time complexity of O(log n). Here let us see whether we can use Queue or priority queue when we are using priority queue. Java framework for Queue and Priority Queue
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