HashMap should be unsorted but still sorts according to key

Question

According to these:

1. http://docs.oracle.com/javase/6/docs/api/java/util/HashMap.html
2. Difference between HashMap, LinkedHashMap and TreeMap
3. jav

Answer 1

Actually It can not be ensured the order.

Hashmap uses hashcode to hash data for search fast.

Your key is so simple, so it sorted.