// ****************************************************
// Interface for the ADT list
// ****************************************************
public interface ListInterface {
  // list operations:
  public boolean isEmpty();
  public int size();
  public void add(int index, Object item)
                        throws ListIndexOutOfBoundsException;
  public void remove(int index)
                        throws ListIndexOutOfBoundsException;
  public Object get(int index) 
                        throws ListIndexOutOfBoundsException;
  public void removeAll(); 
} // end ListInterface