sort and group a java collection

Question

I have an object which has a name and a score. I would like to sort a collection of such objects so that they are grouped by name and sorted by maximum score in each group (and

Answer 1

I think you can do this. First check to see if the group is equal. If it is then compare on score. Otherwise return which group you want to be more on top. Let me code it up.

    class Item{
      String name;
      int score;
    }

   new Comparator(){

       @Override
       public int compare(Item o1, Item o2) {
            if (o1.name.equals(o2.name)) {
                return o1.score > o2.score ? 1 : -1; // might have to flip this. I didn't test
            }else {
                return o1.name.compareTo(o2.name);
            }
       }
    };