Solved Sorting a HashMap by Integer values in descending order (Strictly Java Issue)

I am trying to sort arenas (more than one) by integer values in a hashmap in descending order. Using a comparator, I can get a sorted list of arenas in ascending order according to integer value but not in descending order.

My code:

Code:java

            final Map<Arena, Integer> timesPlayed = new HashMap<Arena, Integer>();
            // This is where I input arenas and their integer values, code not shown because irrelevant
            // Sort the map
            List<Arena> list = new ArrayList<Arena>(timesPlayed.keySet());
            Collections.sort(list, new Comparator<Arena>() {
                @Override
                public int compare(Arena a1, Arena a2) {
                    Integer timesPlayed1 = timesPlayed.get(a1);
                    Integer timesPlayed2 = timesPlayed.get(a2);
                    return timesPlayed1.compareTo(timesPlayed2); // I tried also comparing to -timesPlayed2 but this doesn't sort properly
                }
            });
 
            // All code after this is irrelevant to issue
            }

 

Reverse the compareTo call by calling it on the second value and passing the first. Or you could negate the returned value.

 

Never mind, I remembered the reverseOrder() method on Collections.

Updated code: https://github.com/AoHRuthless/King...gard/KotH/command/user/ListArenaCmd.java#L104

Edit: Ninja'd by Rocoty

 

AoH_Ruthless Yeah that will do the same as my first suggestion behind the scenes, if one is to believe GrepCode.