uk.ac.starlink.util
Class CountMap<T>

java.lang.Object
  uk.ac.starlink.util.CountMap<T>

public class CountMap<T>
extends Object

Keeps track of the number of times an item of type T has been added.

Since:

3 Jun 2011

Constructor Summary

CountMap()
Constructor.

Method Summary

int	addItem(T item) Counts an item.
void	clear() Sets all the item counts to zero.
int	getCount(T key) Returns the number of times a given item has been added.
Set<T>	keySet() Returns a set of all the items with a count of at least one.

Methods inherited from class java.lang.Object

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

Constructor Detail

CountMap

public CountMap()

Constructor.

Method Detail

addItem

public int addItem(T item)

Counts an item.

Parameters:

item - item to count

getCount

public int getCount(T key)

Returns the number of times a given item has been added.

Parameters:

key - item to count

keySet

public Set<T> keySet()

Returns a set of all the items with a count of at least one.

Returns:

key set

clear

public void clear()

Sets all the item counts to zero.