RFR: 8057543: Replace javac's Filter with Predicate (and lambdas)

[Guoxiong Li]

On Mon, 19 Apr 2021 10:41:44 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> Hi all,
>> 
>> This patch replaces javac's `Filter` with `Predicate` and sets `Filter` as `Deprecated`.
>> Two existing tests failed and I fixed it.
>> Currently, all the tests in `test/langtools` passed locally by using the following command.
>> 
>> 
>> make test CONF=linux-x86_64-server-release JOBS=4 TEST=test/langtools/
>> 
>> 
>> Thank you for taking the time to review.
>> 
>> Best Regards.
>
> @edvbld Can you please help?

@mcimadamore The PR could be reopen by typing `/open` command. We can continue the work now. I would resolve the git conflicts later.

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PR: https://git.openjdk.java.net/jdk/pull/1898