com.google.common.collect
Class ForwardingMap.StandardKeySet
java.lang.Object
java.util.AbstractCollection<E>
java.util.AbstractSet<K>
com.google.common.collect.ForwardingMap.StandardKeySet
- All Implemented Interfaces:
- Iterable<K>, Collection<K>, Set<K>
- Enclosing class:
- ForwardingMap<K,V>
@Beta
protected class ForwardingMap.StandardKeySet
- extends AbstractSet<K>
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
ForwardingMap.StandardKeySet
public ForwardingMap.StandardKeySet()
iterator
public Iterator<K> iterator()
- Specified by:
iterator in interface Iterable<K>- Specified by:
iterator in interface Collection<K>- Specified by:
iterator in interface Set<K>- Specified by:
iterator in class AbstractCollection<K>
size
public int size()
- Specified by:
size in interface Collection<K>- Specified by:
size in interface Set<K>- Specified by:
size in class AbstractCollection<K>
isEmpty
public boolean isEmpty()
- Specified by:
isEmpty in interface Collection<K>- Specified by:
isEmpty in interface Set<K>- Overrides:
isEmpty in class AbstractCollection<K>
contains
public boolean contains(Object o)
- Specified by:
contains in interface Collection<K>- Specified by:
contains in interface Set<K>- Overrides:
contains in class AbstractCollection<K>
remove
public boolean remove(Object o)
- Specified by:
remove in interface Collection<K>- Specified by:
remove in interface Set<K>- Overrides:
remove in class AbstractCollection<K>
removeAll
public boolean removeAll(Collection<?> c)
- Specified by:
removeAll in interface Collection<K>- Specified by:
removeAll in interface Set<K>- Overrides:
removeAll in class AbstractSet<K>
clear
public void clear()
- Specified by:
clear in interface Collection<K>- Specified by:
clear in interface Set<K>- Overrides:
clear in class AbstractCollection<K>
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