RFR: 7903811: Build fail because of newer Java syntax used

[Alexandre Iline]

Use older syntax for now.
Review the build JDK version later

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Commit messages:
 - CODETOOLS-7903811: Build fail because of newer Java syntax used

Changes: https://git.openjdk.org/jcov/pull/47/files
  Webrev: https://webrevs.openjdk.org/?repo=jcov&pr=47&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903811
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jcov/pull/47.diff
  Fetch: git fetch https://git.openjdk.org/jcov.git pull/47/head:pull/47

PR: https://git.openjdk.org/jcov/pull/47