protected class ReadWriteBackingMap.KeySet extends AbstractSet
Modifier | Constructor and Description |
---|---|
protected |
KeySet() |
Modifier and Type | Method and Description |
---|---|
void |
clear()
Removes all of the elements from this set of Keys by clearing the underlying Map.
|
boolean |
contains(Object oKey)
Determine if a particular key is present in the Set.
|
Iterator |
iterator()
Returns an iterator over the elements contained in this collection.
|
boolean |
remove(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.
|
Object[] |
toArray()
Returns an array containing all of the keys in this set.
|
Object[] |
toArray(Object[] ao)
Returns an array with a runtime type is that of the specified array and that contains all of the keys in this Set.
|
equals, hashCode, removeAll
add, addAll, containsAll, isEmpty, retainAll, toString
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
add, addAll, containsAll, isEmpty, retainAll, spliterator
parallelStream, removeIf, stream
public Iterator iterator()
iterator
in interface Iterable
iterator
in interface Collection
iterator
in interface Set
iterator
in class AbstractCollection
public int size()
size
in interface Collection
size
in interface Set
size
in class AbstractCollection
public boolean contains(Object oKey)
contains
in interface Collection
contains
in interface Set
contains
in class AbstractCollection
public boolean remove(Object o)
remove
in interface Collection
remove
in interface Set
remove
in class AbstractCollection
o
- object to be removed from this set, if presentpublic void clear()
clear
in interface Collection
clear
in interface Set
clear
in class AbstractCollection
public Object[] toArray()
toArray
in interface Collection
toArray
in interface Set
toArray
in class AbstractCollection
public Object[] toArray(Object[] ao)
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.)
toArray
in interface Collection
toArray
in interface Set
toArray
in class AbstractCollection
ao
- 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 purposeArrayStoreException
- if the runtime type of the specified array is not a supertype of the runtime type of every element in this Set of keys