ok, thx. Well, I see some things that confuses me. First of all, try to add "@Override" right above "public void addInformation..."
Next, your class should extend Item, not item. For compiler they are two different classes. Does it compile, actually?
Also I don't see the constructor for your staff. You should add
public ender_staff(Properties properties) {
super(properties);
}
right between "public class ender_staff extends Item {" and added "@Override"