I am a beginner of a java. I want to calculate CRC32 algorithum on aix 5.2 using java. How can I do this ? ( my understanding is it is part of java.util.zip. But I can not find this file ? How to install it ? )
A good source for examples of the core Java classes is http://www.javaalmanac.com/egs (you might want to bookmark this). Calculating the CRC32 of a file is demonstrated here.
The Sun Java Tutorial is a good place to start learning about concepts like packages.