On 4/18/21 9:51 AM, Peter Levart wrote:
public interface Collection<E> .... {
default Collection<E> reversed() { return this; }
default void addFirst(E e) { throw new
UnsupportedOperationException(); }
default void addLast(E e) { throw new
UnsupportedOperationException(); }
For unordered collections this could as well be:
default void addFirst(E e) { return add(e); }
default void addLast(E e) { return add(e); }
As the iteration of such modified unordered collection would not
guarantee any order. SortedSet would of course override them with
throwing methods.
default E getFirst() { return iterator().next(); }
default E getLast() { return iterator().next(); }
default E removeFirst() { var i = iterator(); i.next();
i.remove(); }
default E removeLast() { var i = iterator(); i.next();
i.remove(); }
}
