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public interface Set extends Collection { | |
int size(); | |
boolean isEmpty(); | |
boolean contains(Object o); | |
Iterator<E> iterator(); | |
Object[] toArray(); | |
<T> T[] toArray(T[] a); | |
boolean add(E e); | |
boolean remove(Object o); | |
boolean containsAll(Collection<?> c); | |
boolean addAll(Collection<? extends E> c); | |
boolean retainAll(Collection<?> c); | |
boolean removeAll(Collection<?> c); | |
void clear(); | |
boolean equals(Object o); | |
int hashCode(); | |
} |
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