@Beta public abstract class SingletonSet<E> extends Object implements Set<E>, Immutable, Serializable
Set containing a single value. For some reason neither Java nor Guava provide direct access to the retained
element -- which is desirable in some situations, as is the case in SharedSingletonMap.entrySet().| Constructor and Description |
|---|
SingletonSet() |
| Modifier and Type | Method and Description |
|---|---|
boolean |
add(E e) |
boolean |
addAll(Collection<? extends E> c) |
void |
clear() |
boolean |
containsAll(Collection<?> c) |
boolean |
equals(Object obj) |
abstract E |
getElement() |
abstract int |
hashCode() |
boolean |
isEmpty() |
@NonNull Iterator<E> |
iterator() |
static <E> @NonNull SingletonSet<E> |
of(E element) |
boolean |
remove(Object o) |
boolean |
removeAll(Collection<?> c) |
boolean |
retainAll(Collection<?> c) |
int |
size() |
abstract @NonNull Spliterator<E> |
spliterator() |
@NonNull Object[] |
toArray() |
<T> T[] |
toArray(T[] a) |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, waitparallelStream, removeIf, streampublic static <E> @NonNull SingletonSet<E> of(E element)
public abstract E getElement()
public final int size()
public final boolean isEmpty()
public abstract @NonNull Spliterator<E> spliterator()
spliterator in interface Iterable<E>spliterator in interface Collection<E>spliterator in interface Set<E>public final @NonNull Object[] toArray()
public final <T> T[] toArray(T[] a)
public final boolean add(E e)
public final boolean remove(Object o)
public final boolean containsAll(Collection<?> c)
containsAll in interface Collection<E>containsAll in interface Set<E>public final boolean addAll(Collection<? extends E> c)
public final boolean retainAll(Collection<?> c)
public final boolean removeAll(Collection<?> c)
public final void clear()
public abstract int hashCode()
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