pure interface of class gj.util.Dictionary<A, B>

public abstract class Dictionary<A, B>
{
    public abstract int size();
    public abstract boolean isEmpty();
    public abstract Enumeration<A> keys();
    public abstract Enumeration<B> elements();
    public abstract B get(A key);
    public abstract B put(A key,
                          B value);
    public abstract B remove(A key);
    public Dictionary();
}