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Jar Hyper Compression ?

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mgrev
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Joined: 2003-08-12

I don't know if I've been in all the wrong places, but I can't find very much information on the hyper compression of Jars, mentioned quite a few times at JavaOne 2003. Can anyone point me in the right direction? I'm primarily interested in getting these questions answered:

1) When will it be released, and used
2) When can we (developers) use it
3) Can it be used when deploying applets and/or apps
4) How about backward compatibility
5) The 30-fold ratio mentioned, that's like incredible. Is this max, normal or min?
6) Is there any catch? ;-)

Regards,
Mikael

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billharnois
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Joined: 2006-02-17

1) When will it be released, and used

As part of J2SDK 1.5.

2) When can we (developers) use it

With J2SDK 1.5 Early Access.

3) Can it be used when deploying applets and/or apps

Both.

4) How about backward compatibility

The APIs will work only with J2SE 1.5 and above.

5) The 30-fold ratio mentioned, that's like incredible. Is this max, normal or min?

Depending on the size of the jar and the contents, namely class vs. resources,.
you should expect around 5-8 times reduction.

6) Is there any catch?

The processing time to decompress should be lesser that the download time.
So therefore you must make some measurements to see if your jars are large
enough.

You can send an email to kumar.srinivasan@Sun.COM