RFR: 8285149: Using HashMap.newHashMap to replace new HashMap(int) [v6]

[XenoAmess]

> These are the changes that too many to be reviewed in 8186958, thus split some of them out.

XenoAmess has updated the pull request incrementally with one additional commit since the last revision:

  change from 3 to 1 according to wangweij

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8301/files
  - new: https://git.openjdk.java.net/jdk/pull/8301/files/c9cfb50a..1b4bac0f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8301&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8301&range=04-05

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8301.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8301/head:pull/8301

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