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1. HashMap props = new HashMap();
2. props.put("key45", "some value");
3. props.put("key12", "some other value");
4. props.put("key39", "yet another value");
5. Set s = props.keySet();
6. // insert code here
What, inserted at line 6, will sort the keys in the props HashMap?

A.	Arrays.sort(s);	B.	s = new TreeSet(s);
C.	Collections.sort(s);	D.	s = new SortedSet(s);

Answer and Explanation

Answer:s = new TreeSet(s);

Explanation:
If you store HashMap values into TreeSet then values will get sorted automatically,so here we are storing HashMap values into TreeSet.

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