6. Collection Interface

6. Collection Interface
	Chapter 9. Associatons and Collections

Basic Operations:

    int size();
    boolean isEmpty();
    boolean contains(Object element);
    boolean add(E element);         //optional
    boolean remove(Object element); //optional
    Iterator<E> iterator();

Bulk Operations:

containsAll — returns true if the target Collection contains all of the elements in the specified Collection.
addAll — adds all of the elements in the specified Collection to the target Collection.
removeAll — removes from the target Collection all of its elements that are also contained in the specified Collection.
retainAll — removes from the target Collection all its elements that are not also contained in the specified Collection. That is, it retains only those elements in the target Collection that are also contained in the specified Collection.
clear — removes all elements from the Collection.

    boolean containsAll(Collection<?> c);
    boolean addAll(Collection<? extends E> c); //optional
    boolean removeAll(Collection<?> c);        //optional
    boolean retainAll(Collection<?> c);        //optional
    void clear();                              //optional

Array Convertions:

    // Array operations
    Object[] toArray();
    <T> T[] toArray(T[] a


5. Core Collection Interfaces		7. Set Interface