RFR: 8265418: Clean-up redundant null-checks of Class.getPackageName()

[Alan Bateman]

On Mon, 19 Apr 2021 14:05:31 GMT, Сергей Цыпанов <github.com+10835776+stsypanov at openjdk.org> wrote:

> As discussed in https://github.com/openjdk/jdk/pull/3464 we can clean-up null-checks remaining after [8142968](https://bugs.openjdk.java.net/browse/JDK-8142968) as Class.getPackageName() never returns null.

src/java.base/share/classes/java/util/concurrent/atomic/AtomicIntegerFieldUpdater.java line 458:

> 456:         private static boolean isSamePackage(Class<?> class1, Class<?> class2) {
> 457:             return class1.getClassLoader() == class2.getClassLoader()
> 458:                    && class1.getPackageName().equals(class2.getPackageName());

If the j.u.c.atomic code is changed then it will need to be coordinated with Doug Lea's repo. The rest of the changes are good and thanks for following up from the comments in the other issue.

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PR: https://git.openjdk.java.net/jdk/pull/3571