ForwardingSet.java

import java.util.Collection;
import java.util.Iterator;
import java.util.Set;

public class ForwardingSet<E> implements Set<E> {
	private final Set<E> s;
	public ForwardingSet(Set<E> s) { this.s = s;}
	
	@Override
	public boolean add(E e) {
		return s.add(e);
	}

	@Override
	public boolean addAll(Collection<? extends E> arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public void clear() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public boolean contains(Object arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean containsAll(Collection<?> arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean isEmpty() {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public Iterator<E> iterator() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public boolean remove(Object arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean removeAll(Collection<?> arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean retainAll(Collection<?> arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public int size() {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public Object[] toArray() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public <T> T[] toArray(T[] arg0) {
		// TODO Auto-generated method stub
		return null;
	}
	public Forwading

	@Override
	public boolean equals(Object o) {
	    return s.equals(o);
	}

	@Override
	public int hashCode() {
	    return size().hashCode();
	}

	@Override
	public String toString() {
	    return s.toString();
	}
// test
}