Set

/**
 * 
 * @author SeekerLinJunYu
 *
 * @param <E>
 */
public class LinkedListSet<E> implements Set<E> {
    private LinkedListClass<E> linkedlist;
    
    public LinkedListSet() {
        linkedlist = new LinkedListClass<>();
    }
    
    @Override
    public void add(E e) {
        if (linkedlist.constains(e)) {
            return;
        }
        else
            linkedlist.add(0, e);
    }
    
    @Override
    public boolean isEmpty() {
        return linkedlist.isEmpty();
    }
    
    @Override
    public int getSize() {
        return linkedlist.getSize();
    }
    
    @Override
    public boolean contains(E e) {
        return linkedlist.constains(e);
    }

    @Override
    public void remove(E e) {
        linkedlist.removeElement(e);
    }
}

BSTSet

/**
 * 
 * @author Administrator
 *
 * @param <E>
 */
public class BSTSet<E extends Comparable<E>> implements Set<E> {
    private BST<E> bst;
    
    public BSTSet() {
        bst = new BST<>();
    }
    @Override
    public void add(E e) {
        bst.add(e);
    }
    
    @Override
    public boolean isEmpty() {
        return bst.isEmpty();
    }
    
    @Override
    public boolean contains(E e) {
        return bst.contains(e);
    }
    
    @Override
    public void remove(E e) {
        bst.removeElement(e);
    }
    
    @Override
    public int getSize() {
        return bst.getSize();
    }

}