Nick.han created HBASE-20359:

             Summary: why Comparator extends comparable?
                 Key: HBASE-20359
             Project: HBase
          Issue Type: Improvement
            Reporter: Nick.han

Comparable is an interface,object implements this interface can be compare with 
some other object, Comparator is a tool for compare object,the tool itself can 
be compare is useless, so why a tool implement the comparable interface?Do we 
have to  improve this?

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