Lambda expression for comparator can be further shortened (for numeric types, descending): ( o1, o2) -> o2 - o1 No ternaries or else-ifs required. Swap o1 an

Lambda expression for comparator can be further shortened (for numeric types, descending): ( o1, o2) -> o2 - o1 No ternaries or else-ifs required. Swap o1 and o2 if you want ascending.