RFR: 8325304: Several classes in java.util.jar and java.util.zip don't specify the behaviour for null arguments [v4]

[Jaikiran Pai]

> Can I please get a review of this doc-only change which updates the javadoc of several classes in `java.util.jar` and `java.util.zip` to specify their behaviour when `null` arguments are passed to the constructor or methods of those classes?
> 
> For these updated classes, I have individually checked that they indeed throw a `NullPointerException` when `null` is passed to their constructor or methods. The couple of places where `null` is accepted have been updated to mention that `null` is allowed.

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

  Alan's review - don't repeat NullPointerException specification within same class

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17728/files
  - new: https://git.openjdk.org/jdk/pull/17728/files/f92c5726..59d4df6b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17728&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17728&range=02-03

  Stats: 6 lines in 3 files changed: 0 ins; 6 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17728.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17728/head:pull/17728

PR: https://git.openjdk.org/jdk/pull/17728