Java PriorityQueue clear() method9 Nov 2024 | 2 min read The clear() method of PriorityQueue class Removes all the elements from this priority queue. After calling this method, the queue will be empty. SyntaxParameterNA Specified ByThe clear() method of class PriorityQueue is specified by clear() method in interface Collection<E>. OverrideThe clear() method of class PriorityQueue overrides the clear() method of class AbstractQueue<E>. Example 1Output: Course : [C, C++, Java, Python] After clearing the queue : [] Example 2Output: 1 Roll No = 2 Name = ravi Course = C Age = 21 2 Roll No = 1 Name = Geetanjali Course = Java Age = 21 3 Roll No = 3 Name = HimanshuBhardwaj Course = C++ Age = 21 After clearing the queue : [] Next TopicJava-priorityqueue-comparator-method |
The size() method of PriorityQueue class returns the number of elements contained by this collection. If there are more than Integer.MAX_VALUE elements in this collection, the method returns Integer.MAX_VALUE. Syntax public int size() Parameter NA Specified By The size() method of PriorityQueue class is specified by: size() method in interface Collection<E>. size() method in...
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The offer() method of the PriorityQueue class is used to insert the specified element into this priority queue. Syntax public boolean offer(E e) Parameter e - It is the element to be added. Specified By The offer() method of the PrioriryQueue class is specified by offer() method n interface Queue<E>. Return Value The offer()...
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The poll() method of PriorityQueue class retrieves the head of this queue, and also removes it. The method returns null if this queue is empty. Syntax public E poll() Parameter NA Return Value The poll() method returns this queue's head, and if this queue is empty returns null. Example 1 import java.util.PriorityQueue; public class PriorityQueuePollExample1...
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The toArray() method of PriorityQueue class returns an array containing all the elements present in the queue where the elements are present in no particular order. The array is returned, if the queue fits in the specified array. Else, a new array is allocated with the same...
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The add() method of the PriorityQueue class is used to insert the specified element into this priority queue. Syntax public boolean add(E e) Parameter e - It is the element to be added Override The add() method of class PriorityQueue overrides the add() method of class AbstractQueue<E>. Return Value The add() method returns true(as...
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The spliterator() method of the PriorityQueue class creates a late-binding and fail-fast Spliterator that does not traverse the elements in any particular order in this queue. Syntax public final Spliterator<E>spliterator() Parameter NA Specified By The spliterator() method of the PriorityQueue class is specified by: spliterator in interface Collection<E>. spliterator in interface Iterable<E>. Return Value The spliterator...
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The remove() method of PriorityQueue class removes a single instance of the specified element from this queue, only if it is present. Syntax public boolean remove(Object o) Parameter o - It is the element to be eliminated from this queue. Specified By The remove() method of the PriorityQueue class is specified by...
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The comparator() method of PriorityQueue() class returns the comparator that is used to order the elements of this queue, or returns null if the elements of this queue are sorted according to natural ordering. Syntax public Comparator<? superE> comparator() Return Value The comparator() method returns the comparator that is used...
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The contains() method of PriorityQueue class returns true if the specified element is present in this queue. Syntax public boolean contains(Object o) Parameter o - It is the object that is to be checked for occurrence in this queue. Specified By The contains() method of PriorityQueue class is specified by contains() method...
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The iterator() method of the PriorityQueue class returns an iterator over the elements in this queue. The elements are not returned in any particular order by the iterator. Syntax public Iterator<E> iterator() Parameter NA Specified By The iterator() method of the PrioriryQueue class is specified by: iterator() method in interface Collection<E>. iterator() method in interface...
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