code: public boolean add(Object o) {
  		try {
  			this.addElement((Element) o);
  			return true;
  		}
  		catch(ClassCastException cce) {
  			throw new ClassCastException("You can only add objects that implement the Element interface.");
  		}
  		catch(BadElementException bee) {
  			throw new ClassCastException(bee.getMessage());
  		}
  	}
docs: Add an <CODE>Object</CODE> to this cell.
  
  @param o the object to add
  @return always <CODE>true</CODE>