小编Jes*_*ias的帖子

如何按Set大小总和对Map（String，List（Set（Long）））排序？我有一个像这样的HashMap：

myMap.put("monday", [[3215, 5654], [5345], [3246, 7686, 4565]]) // 6 Long elements in total
myMap.put("tuesday", [[3215, 5654], [5345, 2879, 6734], [3246, 7686, 4565]]) // 8 Long elements in total
myMap.put("wednesday", [[9845, 2521], [0954]]) // 3 Long elements in total

我希望myMap排序如下：

("tuesday", [[3215, 5654], [5345, 2879, 6734], [3246, 7686, 4565]]) // 8 Long elements in total
("monday", [[3215, 5654], [5345], [3246, 7686, 4565]]) // 6 Long elements in total
("wednesday", [[9845, 2521], [0954]]) // 3 Long elements in total