public interface Map {
  // Basic Operations
  Object put(Object key, Object value);
  Object get(Object key);
  Object remove(Object key);
  boolean containsKey(Object key);
  boolean containsValue(Object value);
  int size();
  boolean isEmpty();
  
  // Bulk Operations
  void putAll(Map t);
  void clear();
  
  // Collection Views
  public Set keySet();
  public Collection values();
  public Set entrySet();
  
  // Interface for entrySet elements
  public interface Entry {
    Object getKey();
    Object getValue();
    Object setValue(Object value);
  }
}