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Showing content from https://docs.oracle.com/en/java/javase/24/docs/api/java.base/java/util/PriorityQueue.html below:

PriorityQueue (Java SE 24 & JDK 24)

Type Parameters:

E - the type of elements held in this queue

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>, Queue<E>

• Constructor Summary

  Constructors

  Creates a

  PriorityQueue

  with the default initial capacity (11) that orders its elements according to their

  natural ordering

  .

  Creates a

  PriorityQueue

  with the specified initial capacity that orders its elements according to their

  natural ordering

  .

  Creates a PriorityQueue with the specified initial capacity that orders its elements according to the specified comparator.

  Creates a PriorityQueue containing the elements in the specified collection.

  Creates a PriorityQueue with the default initial capacity and whose elements are ordered according to the specified comparator.

  Creates a PriorityQueue containing the elements in the specified priority queue.

  Creates a PriorityQueue containing the elements in the specified sorted set.

• Method Summary

  boolean

  Inserts the specified element into this priority queue.

  void

  Removes all of the elements from this priority queue.

  Returns the comparator used to order the elements in this queue, or

  null

  if this queue is sorted according to the

  natural ordering

  of its elements.

  boolean

  Returns true if this queue contains the specified element.

  void

  Performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception.

  Returns an iterator over the elements in this queue.

  boolean

  Inserts the specified element into this priority queue.

  Retrieves, but does not remove, the head of this queue, or returns null if this queue is empty.

  Retrieves and removes the head of this queue, or returns null if this queue is empty.

  boolean

  Removes a single instance of the specified element from this queue, if it is present.

  boolean

  Removes all of this collection's elements that are also contained in the specified collection (optional operation).

  boolean

  Removes all of the elements of this collection that satisfy the given predicate (optional operation).

  boolean

  Retains only the elements in this collection that are contained in the specified collection (optional operation).

  int

  Returns the number of elements in this collection.

  Returns an array containing all of the elements in this queue.

  <T> T[]

  Returns an array containing all of the elements in this queue; the runtime type of the returned array is that of the specified array.

• Constructor Details
  • PriorityQueue
  • PriorityQueue
  • PriorityQueue
  • PriorityQueue
  • PriorityQueue
  • PriorityQueue
  • PriorityQueue
• Method Details
  • add
  • offer
  • peek
  • remove
  • contains
  • toArray
  • toArray
  • iterator
  • size
  • clear
  • poll
  • comparator
  • spliterator
  • removeIf
  • removeAll
  • retainAll
  • forEach

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