java.util.Pair

[Weijun Wang]

Hi All

There are multiple CRs asking for a java.util.Pair class:

   4983155
   6229146
   4947273

I know such a simple thing can be made very complex and everyone might want to add a new method into it. How about we just make it most primitive? Simply an immutable and Serializable class, two final fields, one constructor, two getters (?), and no static factory methods. (S)he who does the real implementation has the privilege to choose between head/tail and car/cdr.

Thanks
Max