I am trying to compare the 2 objects from line 49 but I can't get to their members. ex name; I see that class Stock extends hashmap and that the constructor takes as argument some variables which in turn are put in a map. Is that object a map? Am I supposed to compare the values of o1 and o2? and then rearrange them in the list? I can't find anything relevant on the internet about custom classes extending hashmap and their behaviour. What is going on with this task?