Java HashMap Collection and Base Values ​​()

Question

I was wondering if the presentation of the collection of values ​​contained in the HashMap is supported when the HashMap changes.

For example, if I have a HashMap, the values ​​() method returns L = {a, b, c} What happened to L if I add a new "d" element to the map? It is added at the end, that is, if I repeat the elements, is this order preserved?

In particular, if adding a new “d” element causes a rework, will the order be kept in L?

Many thanks!

Answer 1

I was wondering if the view of the collection of values ​​contained in the HashMap is preserved when the HashMap changes.

No, there is no such guarantee.

, 1-100

HashMap<Integer, Integer> map = new HashMap<Integer, Integer>();

for (int i = 0; i < 100; i++)
    map.put(i, i);

System.out.println(map.values());

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Answer 2

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Answer 3

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