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Oracle® Coherence Java API Reference
v3.5.1

E15583-01


com.tangosol.util
Class SegmentedHashMap.KeySet

java.lang.Object
  extended by java.util.AbstractCollection
      extended by java.util.AbstractSet
          extended by com.tangosol.util.SegmentedHashMap.KeySet

All Implemented Interfaces:
java.lang.Iterable, java.util.Collection, java.util.Set
Enclosing class:
SegmentedHashMap

protected class SegmentedHashMap.KeySet
extends java.util.AbstractSet

A set of entries backed by this map.


Constructor Summary
protected SegmentedHashMap.KeySet()
           

 

Method Summary
 void clear()
          Removes all of the elements from this set of Keys by clearing the underlying Map.
 boolean contains(java.lang.Object oKey)
          Determine if a particular key is present in the Set.
 java.util.Iterator iterator()
          Obtain an iterator over the keys in the Map.
 boolean remove(java.lang.Object o)
          Removes the specified element from this Set of keys if it is present by removing the associated entry from the underlying Map.
 int size()
          Determine the number of keys in the Set.
 java.lang.Object[] toArray()
          Returns an array containing all of the keys in this set.
 java.lang.Object[] toArray(java.lang.Object[] a)
          Returns an array with a runtime type is that of the specified array and that contains all of the keys in this Set.

 

Methods inherited from class java.util.AbstractSet
equals, hashCode, removeAll

 

Methods inherited from class java.util.AbstractCollection
add, addAll, containsAll, isEmpty, retainAll, toString

 

Methods inherited from interface java.util.Set
add, addAll, containsAll, isEmpty, retainAll

 

Constructor Detail

SegmentedHashMap.KeySet

protected SegmentedHashMap.KeySet()

Method Detail

iterator

public java.util.Iterator iterator()
Obtain an iterator over the keys in the Map.
Specified by:
iterator in interface java.lang.Iterable
Specified by:
iterator in interface java.util.Collection
Specified by:
iterator in interface java.util.Set
Specified by:
iterator in class java.util.AbstractCollection
Returns:
an Iterator that provides a live view of the keys in the underlying Map object

size

public int size()
Determine the number of keys in the Set.
Specified by:
size in interface java.util.Collection
Specified by:
size in interface java.util.Set
Specified by:
size in class java.util.AbstractCollection
Returns:
the number of keys in the Set, which is the same as the number of entries in the underlying Map

contains

public boolean contains(java.lang.Object oKey)
Determine if a particular key is present in the Set.
Specified by:
contains in interface java.util.Collection
Specified by:
contains in interface java.util.Set
Overrides:
contains in class java.util.AbstractCollection
Returns:
true iff the passed key object is in the key Set

remove

public boolean remove(java.lang.Object o)
Removes the specified element from this Set of keys if it is present by removing the associated entry from the underlying Map.
Specified by:
remove in interface java.util.Collection
Specified by:
remove in interface java.util.Set
Overrides:
remove in class java.util.AbstractCollection
Parameters:
o - object to be removed from this set, if present
Returns:
true if the set contained the specified element

clear

public void clear()
Removes all of the elements from this set of Keys by clearing the underlying Map.
Specified by:
clear in interface java.util.Collection
Specified by:
clear in interface java.util.Set
Overrides:
clear in class java.util.AbstractCollection

toArray

public java.lang.Object[] toArray()
Returns an array containing all of the keys in this set.
Specified by:
toArray in interface java.util.Collection
Specified by:
toArray in interface java.util.Set
Overrides:
toArray in class java.util.AbstractCollection
Returns:
an array containing all of the keys in this set

toArray

public java.lang.Object[] toArray(java.lang.Object[] a)
Returns an array with a runtime type is that of the specified array and that contains all of the keys in this Set. If the Set fits in the specified array, it is returned therein. Otherwise, a new array is allocated with the runtime type of the specified array and the size of this collection. <p/> If the Set fits in the specified array with room to spare (i.e., the array has more elements than the Set), the element in the array immediately following the end of the Set is set to null. This is useful in determining the length of the Set only if the caller knows that the Set does not contain any null keys.)
Specified by:
toArray in interface java.util.Collection
Specified by:
toArray in interface java.util.Set
Overrides:
toArray in class java.util.AbstractCollection
Parameters:
a - the array into which the elements of the Set are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose
Returns:
an array containing the elements of the Set
Throws:
java.lang.ArrayStoreException - if the runtime type of the specified array is not a supertype of the runtime type of every element in this Set of keys

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Oracle® Coherence Java API Reference
v3.5.1

E15583-01


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