[PUSHED] Java cleanup - use generics to reduce casting

[Fridrich Strba (via Code Review)]

Hi,

Thank you for your patch!  It has been merged to LibreOffice.

If you are interested in details, please visit

    https://gerrit.libreoffice.org/3568

Approvals:
  Fridrich Strba: Verified; Looks good to me, approved


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Gerrit-MessageType: merged
Gerrit-Change-Id: I97d064c425389e687c6f0fbc3a962080f46dd511
Gerrit-PatchSet: 3
Gerrit-Project: core
Gerrit-Branch: master
Gerrit-Owner: Noel Grandin <noelgrandin at gmail.com>
Gerrit-Reviewer: Fridrich Strba <fridrich at documentfoundation.org>