RFR: 8301120: Cleanup utility classes java.util.Arrays and java.util.Collections [v2]

[Stuart Marks]

On Wed, 25 Jan 2023 22:23:26 GMT, Tagir F. Valeev <tvaleev at openjdk.org> wrote:

>> number of minor cleanups could be done in Arrays and Collections utility classes.
>> In Arrays:
>> - Redundant import jdk.internal.misc.Unsafe;
>> - C-style array declaration is used in public static boolean equals(short[] a, short a2[]) (that's the only place in the whole file)
>> 
>> In Collections:
>> - A few obsolete "unchecked" and "rawtypes" suppressions
>> - Unnecessary local variable initializer in get() method
>> - Raw type can be avoided in a number of casts
>> - Explicit type parameters could be omitted or converted to diamonds
>> - A couple of javadoc links on private APIs are malformed
>
> Tagir F. Valeev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert cast removal

Test run looks good, ok to integrate.

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Marked as reviewed by smarks (Reviewer).

PR: https://git.openjdk.org/jdk/pull/12207