RFR: 8268250: Class.arrayType() for a 255-d array throws undocumented IllegalArgumentException [v4]

[Joe Darcy]

> Make explicit illegal argument cases of Class.arrayType.
> 
> Please also review the corresponding CSR: https://bugs.openjdk.java.net/browse/JDK-8268300

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

  Respond to review feedback.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4382/files
  - new: https://git.openjdk.java.net/jdk/pull/4382/files/226b2260..b2a7d900

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4382&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4382&range=02-03

  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4382.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4382/head:pull/4382

PR: https://git.openjdk.java.net/jdk/pull/4382