RFR: 8301042: Need methods to check null elements in an array or a collection [v2]

[Tingjun Yuan]

> Adding the following methods to check the nullity of elements of an array or a collection:
> 
> 
> java.util.Arrays:
> public static <E> E[] requireNoNulls(E[] array)
> public static <E> E[] requireNoNulls(E[] array, String message)
> public static <E> E[] requireNoNulls(E[] array, IntFunction<String> messageGenerator)
> public static <E> E[] requireNoNullsCopied(E[] array)
> public static <E> E[] requireNoNullsCopied(E[] array, IntFunction<String> messageGenerator)
> public static <E> E[] requireNoNullsCopied(E[] array, String message)
> 
> java.util.Collections:
> public static <C extends Iterable<?>> C requireNoNulls(C collection)
> public static <M extends Map<?, ?>> M requireNoNulls(M map)
> public static <C extends Iterable<?>> C requireNoNulls(C collection, String message)
> public static <M extends Map<?, ?>> M requireNoNulls(M map, String message)
> public static <C extends Iterable<?>> C requireNoNulls(C collection, Supplier<String> messageSupplier)
> public static <M extends Map<?, ?>> M requireNoNulls(M map, Supplier<String> messageSupplier)
> public static <L extends List<?>> L requireNoNulls(L list, IntFunction<String> messageGenerator)

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

  `requireNoNullsCopied` should return `result`

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12276/files
  - new: https://git.openjdk.org/jdk/pull/12276/files/81fe5962..46cabde5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12276&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12276&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/12276.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12276/head:pull/12276

PR: https://git.openjdk.org/jdk/pull/12276