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Java Source Code / Java Documentation » Development » PCJ » bak.pcj.map

Source Cross Reference Class Diagram Java Document (Java Doc)

bak.pcj.map .CharKeyDoubleMap

All known Subclasses:   bak.pcj.map .CharKeyDoubleOpenHashMap,  bak.pcj.adapter .MapToCharKeyDoubleMapAdapter,  bak.pcj.map .CharKeyDoubleChainedHashMap,  bak.pcj.map .AbstractCharKeyDoubleMap,
CharKeyDoubleMap
public interface CharKeyDoubleMap (Code)
This interface represents maps from char values to double values. It is not possible to obtain a set of entries from primitive collections maps. Instead, an iterator over entries can be obtained. This removes a number of implementation constraints imposed by having to implement an entry interface.
See Also:   bak.pcj.map.CharKeyDoubleMapIterator
See Also:   java.util.Map
author:
   Søren Bak
version:
   1.1 2003/6/1
since:
   1.0

Method Summary
void clear()
     Clears this map.
boolean containsKey(char key)
     Indicates whether this map contains a mapping from a specified key.
boolean containsValue(double value)
     Indicates whether this map contains a mapping to a specified value.
Parameters:
  value - the value to test for.
CharKeyDoubleMapIterator entries()
     Returns an iterator over the entries of this map.
boolean equals(Object obj)
     Indicates whether this map is equal to some object.
Parameters:
  obj - the object with which to compare this map.
double get(char key)
     Maps a specified key to a value.
int hashCode()
     Returns a hash code value for this map.
boolean isEmpty()
     Indicates whether this map is empty.
CharSet keySet()
     Returns a set view of the keys of this map.
double lget()
     Returns the last value corresponding to a positive result from CharKeyDoubleMap.containsKey(char) containsKey(char) .
double put(char key, double value)
     Adds a mapping from a specified key to a specified value to this map.
void putAll(CharKeyDoubleMap map)
     Adds all mappings from a specified map to this map.
double remove(char key)
     Removes the mapping from a specified key from this map.
Parameters:
  key - the key whose mapping to remove from this map.
int size()
     Returns the size of this map.
double tget(char key)
     Maps a specified key to a value.
void trimToSize()
     Minimizes the memory used by this map.
DoubleCollection values()
     Returns a collection view of the values in this map.

Method Detail
clear
void clear()(Code)
Clears this map.
throws:
  UnsupportedOperationException - if the operation is not supported by this map.

containsKey
boolean containsKey(char key)(Code)
Indicates whether this map contains a mapping from a specified key. If the key is contained in this map, a succeeding call to CharKeyDoubleMap.lget() lget() will return the corresponding value.
Parameters:
  key - the key to test for. true if this map contains a mapping fromthe specified key; returns falseotherwise.
See Also:   CharKeyDoubleMap.lget()

containsValue
boolean containsValue(double value)(Code)
Indicates whether this map contains a mapping to a specified value.
Parameters:
  value - the value to test for. true if this map contains at least onemapping to the specified value; returnsfalse otherwise.

entries
CharKeyDoubleMapIterator entries()(Code)
Returns an iterator over the entries of this map. It is possible to remove entries from this map using the iterator provided that the concrete map supports removal of entries. an iterator over the entries of this map.

equals
boolean equals(Object obj)(Code)
Indicates whether this map is equal to some object.
Parameters:
  obj - the object with which to compare this map. true if this map is equal to thespecified object; returns falseotherwise.

get
double get(char key)(Code)
Maps a specified key to a value. Returns a default value as specified by the MapDefaults class if no mapping exists for the specified key.
Parameters:
  key - the key to map to a value. the value that the specified key maps to, ora default value, if no such mapping exists.
See Also:   MapDefaults
See Also:   CharKeyDoubleMap.tget(char)
See Also:   CharKeyDoubleMap.lget()

hashCode
int hashCode()(Code)
Returns a hash code value for this map. a hash code value for this map.

isEmpty
boolean isEmpty()(Code)
Indicates whether this map is empty. true if this map is empty; returnsfalse otherwise.

keySet
CharSet keySet()(Code)
Returns a set view of the keys of this map. Removals from the returned set removes the corresponding entries in this map. Changes to the map are reflected in the set. a set view of the keys of this map.

lget
double lget()(Code)
Returns the last value corresponding to a positive result from CharKeyDoubleMap.containsKey(char) containsKey(char) . This is useful for checking checking the existence of a mapping while avoiding two lookups on the same key. the value corresponding to the key from thelast invokation of CharKeyDoubleMap.containsKey(char) containsKey(char).
throws:
  IllegalStateException - if CharKeyDoubleMap.containsKey(char) containsKey(char) hasnot been called or the last call resulted ina return value of false.
See Also:   CharKeyDoubleMap.get(char)
See Also:   CharKeyDoubleMap.tget(char)
See Also:   CharKeyDoubleMap.containsKey(char)

put
double put(char key, double value)(Code)
Adds a mapping from a specified key to a specified value to this map. If a mapping already exists for the specified key it is overwritten by the new mapping.
Parameters:
  key - the key of the mapping to add to this map.
Parameters:
  value - the value of the mapping to add to this map. the old value if amapping from the specified key already existedin this map; otherwise returns a default value asspecified by the MapDefaults class.
throws:
  UnsupportedOperationException - if the operation is not supported by this map.
See Also:   MapDefaults

putAll
void putAll(CharKeyDoubleMap map)(Code)
Adds all mappings from a specified map to this map. Any existing mappings whose keys collide with a new mapping is overwritten by the new mapping.
Parameters:
  map - the map whose mappings to add to this map.
throws:
  NullPointerException - if map is null.
throws:
  UnsupportedOperationException - if the operation is not supported by this map.

remove
double remove(char key)(Code)
Removes the mapping from a specified key from this map.
Parameters:
  key - the key whose mapping to remove from this map. the old value if amapping from the specified key already existedin this map; otherwise returns a default value asspecified by the MapDefaults class.
throws:
  UnsupportedOperationException - if the operation is not supported by this map.
See Also:   MapDefaults

size
int size()(Code)
Returns the size of this map. The size is defined as the number of mappings from keys to values. the size of this map.

tget
double tget(char key)(Code)
Maps a specified key to a value. This method should be used when the key is known to be in the map.
Parameters:
  key - the key to map to a value. the value that the specified key maps to.
throws:
  NoSuchMappingException - if the specified key does not map to any value.
See Also:   CharKeyDoubleMap.get(char)
See Also:   CharKeyDoubleMap.lget()

trimToSize
void trimToSize()(Code)
Minimizes the memory used by this map. The exact operation of this method depends on the class implementing it. Implementors may choose to ignore it completely.

values
DoubleCollection values()(Code)
Returns a collection view of the values in this map. The collection is not modifiable, but changes to the map are reflected in the collection. a collection view of the values in this map.

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