Pack200 - make your jar files eight times smaller

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Sounds like one of those spam ads but this one seems to be true: the new Pack200 compression mechanism can apparently reduce the size of jar files by a factor of 8.

Sun's page explains that clever rearranging of a jar's contents makes it much more suitable to zip compression.

Via Nicola Ken who has more to say on JDK 1.5 goodies.