RFR JDK-8185582, Update Zip implementation to use Cleaner, not finalizers

[mandy chung]

On 9/29/17 1:49 PM, Xueming Shen wrote:
> On 9/29/17, 1:18 PM, Peter Levart wrote:
>> Hi Sherman,
>>
>> I looked into ZipFile as promised.
>>
>> One thing I noticed is that FinalizeZipFile.java test fails compilation:
>>
>> test/jdk/java/util/zip/ZipFile/FinalizeZipFile.java:49: error: unreported exception Throwable; must be caught or declared to be thrown
>>              super.finalize();
>>                            ^
>> (the overridden finalize() in InstrumentedZipFile should now declare 
>> throws Throwable, since it overrides Object.finalize() and not 
>> ZipFile.finalize() which is gone).
>>
>>
> Yes, it's the expected source incompatibility issue specified in the 
> CSR request.
> I think I had it changed somewhere but obviously it's not in the 
> webrev. Thanks
> for catching it. Yes, the test needs to update to be catch the throwable.
>

I would suggest to update InstrumentedZipFile to migrate away from the 
finalizer.   I can override the close method instead of the finalize 
method.   It can test explicitly calling close (that's what the test is 
currently doing) and try-with-resource.

Mandy