javadoc.com.google.common.collect.Sets.SetView.html Maven / Gradle / Ivy

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Sets.SetView (Guava: Google Core Libraries for Java 11.0.1 API)























  
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com.google.common.collect


Class Sets.SetView<E>
java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractSet<E>
          com.google.common.collect.Sets.SetView<E>


All Implemented Interfaces: 
Iterable<E>, Collection<E>, Set<E>


Enclosing class:
Sets



public abstract static class Sets.SetView<E>extends AbstractSet<E>




An unmodifiable view of a set which may be backed by other sets; this view
 will change as the backing sets do. Contains methods to copy the data into
 a new set which will then remain stable. There is usually no reason to
 retain a reference of type SetView; typically, you either use it
 as a plain Set, or immediately invoke immutableCopy() or
 copyInto(S) and forget the SetView itself.




Since:
  2.0 (imported from Google Collections Library)











Method Summary







<S extends Set<E>> 


S



copyInto(S set)



          Copies the current contents of this set view into an existing set.



 ImmutableSet<E>
immutableCopy()



          Returns an immutable copy of the current contents of this set view.


 


Methods inherited from class java.util.AbstractSet


equals, hashCode, removeAll


 


Methods inherited from class java.util.AbstractCollection


add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, retainAll, size, toArray, toArray, toString


 


Methods inherited from class java.lang.Object


clone, finalize, getClass, notify, notifyAll, wait, wait, wait


 


Methods inherited from interface java.util.Set


add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, retainAll, size, toArray, toArray


 








Method Detail




immutableCopy
public ImmutableSet<E> immutableCopy()

Returns an immutable copy of the current contents of this set view.
 Does not support null elements.

 Warning: this may have unexpected results if a backing set of
 this view uses a nonstandard notion of equivalence, for example if it is
 a TreeSet using a comparator that is inconsistent with Object.equals(Object).








copyInto
public <S extends Set<E>> S copyInto(S set)

Copies the current contents of this set view into an existing set. This
 method has equivalent behavior to set.addAll(this), assuming that
 all the sets involved are based on the same notion of equivalence.



Returns:
a reference to set, for convenience














  
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Copyright © 2010-2012. All Rights Reserved.

javadoc.com.google.common.collect.Sets.SetView.html Maven / Gradle / Ivy

com.google.common.collect Class Sets.SetView<E>

immutableCopy

copyInto

com.google.common.collect
Class Sets.SetView<E>