Larry White created ARROW-17570:
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             Summary: [Java][Documentation] Add JavaDoc to TransferPair 
interface
                 Key: ARROW-17570
                 URL: https://issues.apache.org/jira/browse/ARROW-17570
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Documentation, Java
            Reporter: Larry White


The TransferPair interface is important to the Java vector module's memory 
management, but there is only a single line class comment, and no comments for 
the methods. The implementations of those methods have subtitles that are 
hidden in the method names. For example, the method transferTo() clears the 
memory in the original vector and resets the rowCount to 0, but 
splitAndTransferTo() only copies the values into new memory and the original is 
unchanged.  



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