structure
Class BinarySearchTree

java.lang.Object
  structure.AbstractStructure
      structure.BinarySearchTree

All Implemented Interfaces:

OrderedStructure, Structure

Direct Known Subclasses:

SplayTree

public class BinarySearchTree
extends AbstractStructure
implements OrderedStructure

A binary search tree structure. This structure maintains data in an ordered tree. It does not keep the tree balanced, so performance may degrade if the tree height is not optimal.

See Also:

SplayTree, BinaryTree

Constructor Summary

BinarySearchTree()
Constructs a binary search tree with no data

BinarySearchTree(Comparator alternateOrder)
Constructs a binary search tree with no data

Method Summary

void	add(Object value) Add a (possibly duplicate) value to binary search tree
void	clear() Removes all data from the binary search tree
boolean	contains(Object value) Determines if the binary search tree contains a value
Object	get(Object value) Returns reference to value found within three.
boolean	isEmpty() Checks for an empty binary search tree
Iterator	iterator() Returns an iterator over the binary search tree.
Object	remove(Object value) Remove an value "equals to" the indicated value.
int	size() Determines the number of data values within the tree
String	toString() Returns a string representing tree

Methods inherited from class structure.AbstractStructure

elements, hashCode, values

Methods inherited from class java.lang.Object

equals, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface structure.Structure

elements, values

Constructor Detail

BinarySearchTree

public BinarySearchTree()

Constructs a binary search tree with no data

BinarySearchTree

public BinarySearchTree(Comparator alternateOrder)

Constructs a binary search tree with no data

Method Detail

isEmpty

public boolean isEmpty()

Checks for an empty binary search tree

Specified by:

isEmpty in interface Structure

Overrides:

isEmpty in class AbstractStructure

Returns:

True iff the tree contains no data

clear

public void clear()

Removes all data from the binary search tree

Specified by:

clear in interface Structure

size

public int size()

Determines the number of data values within the tree

Specified by:

size in interface Structure

Returns:

The number of nodes in the binary search tree

add

public void add(Object value)

Add a (possibly duplicate) value to binary search tree

Specified by:

add in interface Structure

Parameters:

val - A reference to non-null object

contains

public boolean contains(Object value)

Determines if the binary search tree contains a value

Specified by:

contains in interface Structure

Overrides:

contains in class AbstractStructure

Parameters:

val - The value sought. Should be non-null

Returns:

True iff the tree contains a value "equals to" sought value

get

public Object get(Object value)

Returns reference to value found within three. This method can be potentially dangerous if returned value is modified: if modification would change the relation of value to others within the tree, the consistency of the structure is lost Don't modify returned value

Parameters:

val - Value sought from within tree

Returns:

A value "equals to" value sought; otherwise null

remove

public Object remove(Object value)

Remove an value "equals to" the indicated value. Only one value is removed, and no guarantee is made concerning which of duplicate values are removed. Value returned is no longer part of the structure

Specified by:

remove in interface Structure

Parameters:

val - Value sought to be removed from tree

Returns:

Actual value removed from tree

iterator

public Iterator iterator()

Returns an iterator over the binary search tree. Iterator should not be used if tree is modified, as behavior may be unpredicatable Traverses elements using in-order traversal order

Specified by:

iterator in interface Structure

Returns:

An iterator over binary search tree

See Also:

AbstractIterator, Iterator, Enumeration, Structure.elements()

toString

public String toString()

Returns a string representing tree

Overrides:

toString in class Object

Returns:

String representation of tree