RFR: 8268124: Update java.lang to use switch expressions [v3]

[Patrick Concannon]

> Hi,
> 
> Could someone please review my code for updating the code in the `java.lang` packages to make use of the switch expressions?
> 
> Kind regards,
> Patrick

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

  8268124: small refactoring; fixed misplaced comment and added missing lambda operator

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4312/files
  - new: https://git.openjdk.java.net/jdk/pull/4312/files/d705efbd..a8706b02

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4312&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4312&range=01-02

  Stats: 52 lines in 6 files changed: 9 ins; 12 del; 31 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4312.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4312/head:pull/4312

PR: https://git.openjdk.java.net/jdk/pull/4312