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Java Source Code / Java Documentation » Apache Harmony Java SE » java package » java.util 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.util.SortedMap

SortedMap
public interface SortedMap extends Map<K, V>(Code)
SortedMap is a Map where the iterators sequence in order of the sorted keys.




Method Summary
public  Comparator<? super K>comparator()
     Answers the Comparator used to compare elements in this SortedMap.
public  KfirstKey()
     Answer the first sorted key in this SortedMap.
public  SortedMap<K, V>headMap(K endKey)
     Answers a SortedMap of the specified portion of this SortedMap which contains keys less than the end key.
public  KlastKey()
     Answers the last sorted key in this SortedMap.
public  SortedMap<K, V>subMap(K startKey, K endKey)
     Answers a SortedMap of the specified portion of this SortedMap which contains keys greater or equal to the start key but less than the end key.
public  SortedMap<K, V>tailMap(K startKey)
     Answers a SortedMap of the specified portion of this SortedMap which contains keys greater or equal to the start key.



Method Detail
comparator
public Comparator<? super K> comparator()(Code)
Answers the Comparator used to compare elements in this SortedMap. a Comparator or null if the natural order is used



firstKey
public K firstKey()(Code)
Answer the first sorted key in this SortedMap. the first sorted key
exception:
  NoSuchElementException - when this SortedMap is empty



headMap
public SortedMap<K, V> headMap(K endKey)(Code)
Answers a SortedMap of the specified portion of this SortedMap which contains keys less than the end key. Users should be aware that the return value is actually backed by this SortedMap. Hence any modifications made to one will be immediately visible to the other.
Parameters:
  endKey - the end key a submap where the keys are less than endKey
exception:
  ClassCastException - when the class of the end key is inappropriate for thisSubMap
exception:
  NullPointerException - when the end key is null and this SortedMap does notsupport null keys



lastKey
public K lastKey()(Code)
Answers the last sorted key in this SortedMap. the last sorted key
exception:
  NoSuchElementException - when this SortedMap is empty



subMap
public SortedMap<K, V> subMap(K startKey, K endKey)(Code)
Answers a SortedMap of the specified portion of this SortedMap which contains keys greater or equal to the start key but less than the end key. Users should be aware that the return value is actually backed by this SortedMap. Hence any modifications made to one will be immediately visible to the other.
Parameters:
  startKey - the start key
Parameters:
  endKey - the end key a submap where the keys are greater or equal tostartKey and less than endKey
exception:
  ClassCastException - when the class of the start or end key is inappropriatefor this SubMap
exception:
  NullPointerException - when the start or end key is null and this SortedMap doesnot support null keys
exception:
  IllegalArgumentException - when the start key is greater than the end key



tailMap
public SortedMap<K, V> tailMap(K startKey)(Code)
Answers a SortedMap of the specified portion of this SortedMap which contains keys greater or equal to the start key. The returned SortedMap is backed by this SortedMap so changes to one are reflected by the other.
Parameters:
  startKey - the start key a submap where the keys are greater or equal tostartKey
exception:
  ClassCastException - when the class of the start key is inappropriate for thisSubMap
exception:
  NullPointerException - when the start key is null and this SortedMap does notsupport null keys



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