RFR: 8284910: Buffer clean in PasswordCallback [v4]

[Xue-Lei Andrew Fan]

On Tue, 26 Apr 2022 15:45:47 GMT, Xue-Lei Andrew Fan <xuelei at openjdk.org> wrote:

>> Ok, then I would suggest changing the name of the test as it is misleading. I suggest creating a directory named "PasswordCallback" and then adding a test named perhaps "CheckCleanerNotBoundToThis" or something like that. I would change the name of the `checkClearing` method as you are not checking if passwords are cleared. Also update the @summary to describe what it is actually testing. Use code comments if you need to explain it further.
>
> The test has two case now.  One is used to check the PasswordCallback object collection at finalization.  The other one is check the password clearing for clearPassword() method.  Is it better to split into two test files so that the class name could be better fit the purpose?

Never mind, I'm splitting the test case into two.

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PR: https://git.openjdk.java.net/jdk/pull/8272