package com.sun.source.util;


public interface Set<E> extends Collection<E>
{
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();


}