Class IntArrayPriorityQueue

java.lang.Object
it.unimi.dsi.fastutil.ints.IntArrayPriorityQueue
All Implemented Interfaces:
IntPriorityQueue, PriorityQueue<Integer>, Serializable

public class IntArrayPriorityQueue extends Object implements IntPriorityQueue, Serializable
A type-specific array-based priority queue.

Instances of this class represent a priority queue using a backing array—all operations are performed directly on the array. The array is enlarged as needed, but it is never shrunk. Use the trim() method to reduce its size, if necessary.

See Also:
Implementation Specification:
This implementation is extremely inefficient, but it is difficult to beat when the size of the queue is very small.
  • Constructor Details

    • IntArrayPriorityQueue

      public IntArrayPriorityQueue(int capacity, IntComparator c)
      Creates a new empty queue with a given capacity and comparator.
      Parameters:
      capacity - the initial capacity of this queue.
      c - the comparator used in this queue, or null for the natural order.
    • IntArrayPriorityQueue

      public IntArrayPriorityQueue(int capacity)
      Creates a new empty queue with a given capacity and using the natural order.
      Parameters:
      capacity - the initial capacity of this queue.
    • IntArrayPriorityQueue

      public IntArrayPriorityQueue(IntComparator c)
      Creates a new empty queue with a given comparator.
      Parameters:
      c - the comparator used in this queue, or null for the natural order.
    • IntArrayPriorityQueue

      public IntArrayPriorityQueue()
      Creates a new empty queue using the natural order.
    • IntArrayPriorityQueue

      public IntArrayPriorityQueue(int[] a, int size, IntComparator c)
      Wraps a given array in a queue using a given comparator.

      The queue returned by this method will be backed by the given array.

      Parameters:
      a - an array.
      size - the number of elements to be included in the queue.
      c - the comparator used in this queue, or null for the natural order.
    • IntArrayPriorityQueue

      public IntArrayPriorityQueue(int[] a, IntComparator c)
      Wraps a given array in a queue using a given comparator.

      The queue returned by this method will be backed by the given array.

      Parameters:
      a - an array.
      c - the comparator used in this queue, or null for the natural order.
    • IntArrayPriorityQueue

      public IntArrayPriorityQueue(int[] a, int size)
      Wraps a given array in a queue using the natural order.

      The queue returned by this method will be backed by the given array.

      Parameters:
      a - an array.
      size - the number of elements to be included in the queue.
    • IntArrayPriorityQueue

      public IntArrayPriorityQueue(int[] a)
      Wraps a given array in a queue using the natural order.

      The queue returned by this method will be backed by the given array.

      Parameters:
      a - an array.
  • Method Details