heap
Class HeapAscending

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractList<E>
          java.util.Vector
              heap.HeapAscending

All Implemented Interfaces:

HeapImpl, java.io.Serializable, java.lang.Cloneable, java.lang.Iterable, java.util.Collection, java.util.List, java.util.RandomAccess

public class HeapAscending
extends java.util.Vector
implements HeapImpl

An implementation of a priority queue according to Cormen, Leiserson and Rivest. Sorts in ascending order.

Version:

1.0 2/23/96

Author:

Michael J. Radwin

See Also:

Serialized Form

Constructor Summary

HeapAscending()
Constructs a heap with no elements.

HeapAscending(Heapable[] anArray)
Constructs the heap in O(N) time, using a technique similar to bottom-up construction.

Method Summary

Heapable	extract() Removes the minimum (top) element from the Heap, decreases the size of the heap by one, and returns the minimum element.
long	getPriority()
void	insert(Heapable key) Inserts key into the heap, and then upheaps that key to a position where the heap property is satisfied.
Heapable	remove() Removes an element from the heap.

Methods inherited from class java.util.Vector

add, add, addAll, addAll, addElement, capacity, clear, clone, contains, containsAll, copyInto, elementAt, elements, ensureCapacity, equals, firstElement, get, hashCode, indexOf, indexOf, insertElementAt, isEmpty, lastElement, lastIndexOf, lastIndexOf, remove, remove, removeAll, removeAllElements, removeElement, removeElementAt, retainAll, set, setElementAt, setSize, size, subList, toArray, toArray, toString, trimToSize

Methods inherited from class java.util.AbstractList

iterator, listIterator, listIterator

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface heap.HeapImpl

isEmpty, removeAllElements, size

Methods inherited from interface java.util.List

iterator, listIterator, listIterator

Constructor Detail

HeapAscending

public HeapAscending(Heapable[] anArray)

Constructs the heap in O(N) time, using a technique similar to bottom-up construction.

HeapAscending

public HeapAscending()

Constructs a heap with no elements.

Method Detail

extract

public Heapable extract()
                 throws java.util.NoSuchElementException

Removes the minimum (top) element from the Heap, decreases the size of the heap by one, and returns the minimum element.

Specified by:

extract in interface HeapImpl

Throws:

java.util.NoSuchElementException

remove

public Heapable remove()
                throws java.util.NoSuchElementException

Removes an element from the heap.

Specified by:

remove in interface HeapImpl

Throws:

java.util.NoSuchElementException

insert

public void insert(Heapable key)

Inserts key into the heap, and then upheaps that key to a position where the heap property is satisfied.

Specified by:

insert in interface HeapImpl

getPriority

public long getPriority()

Specified by:

getPriority in interface HeapImpl