String[] () { return new String[] { "package java.util;" + "public interface Deque<E> extends Collection<E>{" + " void addFirst(E e);" + " void addLast(E e);" + " boolean offerLast(E e);" + " boolean contains(Object o);" + " boolean removeFirstOccurrence(Object o);" + "}", "package java.util;" + "public abstract class ArrayDeque<E> implements Deque<E> {}" }; }