public interface Set4<T> extends Iterable4<T>
boolean
add(T obj)
void
clear()
contains(T obj)
isEmpty()
Iterator4<T>
iterator()
remove(T obj)
int
size()
boolean add(T obj)
void clear()
boolean contains(T obj)
boolean isEmpty()
Iterator4<T> iterator()
iterator
Iterable4<T>
boolean remove(T obj)
int size()