Package com.google.common.collect
Class ForwardingMap.StandardKeySet
java.lang.Object
java.util.AbstractCollection<K>
java.util.AbstractSet<K>
com.google.common.collect.ForwardingMap.StandardKeySet
- All Implemented Interfaces:
Iterable<K>
,Collection<K>
,Set<K>
- Enclosing class:
ForwardingMap<K,
V>
A sensible implementation of
Map.keySet()
in terms of the following
methods: ForwardingMap.clear()
, ForwardingMap.containsKey(java.lang.Object)
,
ForwardingMap.isEmpty()
, ForwardingMap.remove(java.lang.Object)
, ForwardingMap.size()
, and the Set.iterator()
method of ForwardingMap.entrySet()
. In many cases, you may wish to override ForwardingMap.keySet()
to forward to this implementation or a subclass
thereof.- Since:
- 10.0
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Constructor Summary
Constructors -
Method Summary
Methods inherited from class java.util.AbstractSet
equals, hashCode
Methods inherited from class java.util.AbstractCollection
add, addAll, containsAll, toArray, toArray, toString
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface java.util.Collection
parallelStream, removeIf, stream, toArray
Methods inherited from interface java.util.Set
add, addAll, containsAll, spliterator, toArray, toArray
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Constructor Details
-
StandardKeySet
public StandardKeySet()Constructor for use by subclasses.
-
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Method Details
-
iterator
- Specified by:
iterator
in interfaceCollection<K>
- Specified by:
iterator
in interfaceIterable<K>
- Specified by:
iterator
in interfaceSet<K>
- Specified by:
iterator
in classAbstractCollection<K>
-
size
public int size()- Specified by:
size
in interfaceCollection<K>
- Specified by:
size
in interfaceSet<K>
- Specified by:
size
in classAbstractCollection<K>
-
isEmpty
public boolean isEmpty()- Specified by:
isEmpty
in interfaceCollection<K>
- Specified by:
isEmpty
in interfaceSet<K>
- Overrides:
isEmpty
in classAbstractCollection<K>
-
contains
- Specified by:
contains
in interfaceCollection<K>
- Specified by:
contains
in interfaceSet<K>
- Overrides:
contains
in classAbstractCollection<K>
-
remove
- Specified by:
remove
in interfaceCollection<K>
- Specified by:
remove
in interfaceSet<K>
- Overrides:
remove
in classAbstractCollection<K>
-
clear
public void clear()- Specified by:
clear
in interfaceCollection<K>
- Specified by:
clear
in interfaceSet<K>
- Overrides:
clear
in classAbstractCollection<K>
-
removeAll
- Specified by:
removeAll
in interfaceCollection<E>
- Specified by:
removeAll
in interfaceSet<E>
- Overrides:
removeAll
in classAbstractSet<E>
-
retainAll
- Specified by:
retainAll
in interfaceCollection<E>
- Specified by:
retainAll
in interfaceSet<E>
- Overrides:
retainAll
in classAbstractCollection<E>
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