fixes [JDK-8314199](https://bugs.openjdk.org/browse/JDK-8314199) by initializing the HashSet with a more accurate number
------------- Commit messages: - fixes JDK-8314199 by initializing the HashSet with a more accurate number Changes: https://git.openjdk.org/jdk/pull/16103/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16103&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8314199 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/16103.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16103/head:pull/16103 PR: https://git.openjdk.org/jdk/pull/16103
