csc313.hw1
Class SetOfCountables

java.lang.Object
  |
  +--csc313.hw1.SetOfCountables

public class SetOfCountables

extends Object

This class is a collection that allows an application to count the number of occurences of each different object in its collection. It uses the object's equals method to determine which strings should be counted together.
Created in April 2002

Author:

Craig Miller

Constructor Summary

SetOfCountables()
This constructs an empty set of countable objects.

Method Summary

void	countElement(Object item) This method increments the count for the given item.
int	getCount(Object item)
CountablesIterator	iterator()
static void	main(String[] args)
int	size() This method gets the number of different objects that have been counted.
int	totalCounts() This method returns the number of times all objects have been counted.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SetOfCountables

public SetOfCountables()

This constructs an empty set of countable objects.

Method Detail

countElement

public void countElement(Object item)

This method increments the count for the given item. If the item has not been previously counted (i.e. it is not equal to any previously counted item), the item is added to the collection and its count is initialized to 1.

Parameters:

item - any object with an appropriately defined equals method

getCount

public int getCount(Object item)

Returns:

the number of times the item has been counted or 0 if it has not been counted

size

public int size()

This method gets the number of different objects that have been counted.

Returns:

number of different items (an item is different from another item if the equals method returns false)

totalCounts

public int totalCounts()

This method returns the number of times all objects have been counted.

Returns:

total number of times countElement has been called

iterator

public CountablesIterator iterator()

Returns:

an iterator that allows the application to step through all counted items including the count for each item

main

public static void main(String[] args)