RFR: 8285149: Using HashMap.newHashMap to replace new HashMap(int) [v4]

[XenoAmess]

On Wed, 27 Apr 2022 05:11:54 GMT, XenoAmess <duke at openjdk.java.net> wrote:

> Also do not change J2DBench. We deliberately avoid using new API so that we can take it and run it on very old JDK versions to help track regressions.

For J2DBench, I don't see any changes that not complicated with older jdk version for now. please recheck. thanks.

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PR: https://git.openjdk.java.net/jdk/pull/8301