org.apache.commons.collections4

Class SetUtils.SetView<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

org.apache.commons.collections4.SetUtils.SetView<E>

Type Parameters:

E - the element type

All Implemented Interfaces:

java.lang.Iterable<E>, java.util.Collection<E>, java.util.Set<E>

Enclosing class:

SetUtils

public abstract static class SetUtils.SetView<E>
extends java.util.AbstractSet<E>

An unmodifiable view of a set that may be backed by other sets.

If the decorated sets change, this view will change as well. The contents of this view can be transferred to another instance via the copyInto(Set) and toSet() methods.

Since:

4.1

Constructor Summary

Constructors

Constructor and Description
SetView()

Method Summary

Modifier and Type	Method and Description
<S extends java.util.Set<E>> void	copyInto(S set) Copies the contents of this view into the provided set.
java.util.Iterator<E>	iterator()
int	size()
java.util.Set<E>	toSet() Returns a new set containing the contents of this view.

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Set

add, addAll, clear, contains, containsAll, isEmpty, remove, retainAll, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

SetView

public SetView()

Method Detail

iterator

public java.util.Iterator<E> iterator()

Specified by:

iterator in interface java.lang.Iterable<E>

Specified by:

iterator in interface java.util.Collection<E>

Specified by:

iterator in interface java.util.Set<E>

Specified by:

iterator in class java.util.AbstractCollection<E>

size

public int size()

Specified by:

size in interface java.util.Collection<E>

Specified by:

size in interface java.util.Set<E>

Specified by:

size in class java.util.AbstractCollection<E>

copyInto

public <S extends java.util.Set<E>> void copyInto(S set)

Copies the contents of this view into the provided set.

Type Parameters:

S - the set type

Parameters:

set - the set for copying the contents

toSet

public java.util.Set<E> toSet()

Returns a new set containing the contents of this view.

Returns:

a new set containing all elements of this view