Miscellaneous improvements to "jar".

[Xueming Shen]

6854795

Martin Buchholz wrote:
> Hi jar team,
>
> I have a bunch of minor improvements to
>  src/share/classes/sun/tools/jar/Main.java
>
> Toby and Xueming, please review.
>
> Warning: the index code has not been maintained for many years.
>
> Xueming, please file a bug.
>
> Synopsis: Miscellaneous improvements to "jar".
> Description:
> - Use standard jdk coding style for javadoc
> - Don't create a temp file for jar index in STORED mode.
> - Don't use synchronized collections.
> - Fix javac warnings.
> - Don't define new names for things like INDEX_NAME;
>   use static import instead.
> - more efficiently compare special file names in update mode.
>   Update mode should be measurably faster.
> - make CRC32OutputStream a nested class.
>   refactor crc32.reset and updating entry into CRC32OutputStream.
> - Fix apparently benign bug updating n in 
> CRC32OutputStream.write(byte[], int, int)
>
> Evaluation: Yep.
>
> http://cr.openjdk.java.net/~martin/jar-misc/ 
> <http://cr.openjdk.java.net/%7Emartin/jar-misc/>
>
> Thanks,
>
> Martin