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Browse - Programming Tips - Hashes don't promise any order for keys. Is there a way to keep the keys sorted?
Date: 2015dec15 Language: Java Keywords: HashMap, Hash Q. Hashes don't promise any order for keys. Is there a way to keep the keys sorted? A. Use a TreeMap It is sorted by the ascending order of the keys - ie alphabetical order. The official documentation says:A Red-Black tree based NavigableMap implementation. The map is sorted according to the natural ordering of its keys, or by a Comparator provided at map creation time, depending on which constructor is used.
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