How to fix unchecked call warning in Java?

Question

Here is the code I have written?

Set keys = map.keySet();
SortedSet s = new TreeSet(keys);

The warning I\'m getting is:

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Answer 1

As far as this problem is concerned, you should use parameterized type of keys e.g

Set keys = map.keySet();
SortedSet s = new TreeSet(keys);

where TypeOfKeyObject is object type of Key in your map object.

you may force supress the warnings (as already correctly suggested) but not advisable.

At the risk of sounding condescending, I would suggest you to study generics. A good starting point would be this: http://www.angelikalanger.com/GenericsFAQ/JavaGenericsFAQ.html