How to compress a bunch of .java files into a single .jar file?

Hello everyone! I am working on a Chinese segmentation job. Someone offers very excellent
such tool. When I copy his example, I find it imports
          import org.apache.lucene.analysis.Analyzer;
          import org.apache.lucene.analysis.Token;
          import org.apache.lucene.analysis.TokenStream;
          import org.mira.lucene.analysis.IK_CAnalyzer;I have downloaded IK_CAnalyzer.jar file which contains org.mira.lucene.analysis.IK_CAnalyzer class.
I find that I need to download lucene, thus I went into the following website
http://lucene.apache.org/#06+May+2008+-+Lucene+Java+2.3.2+availableand downloaded the lucene-2.3.2-src.tar.gz. Aftre unzip, I found all java source files in java directory (and in many other different subdirectories). Now it seems I need to compile all the src files and compress them into a single .jar file while keeping their original hierarchy unchanged
I think I should use jar command and with some additional options.
Can anyone show me how to do that?
Many thanks!
Edited by: aaron9979215 on Jul 12, 2008 5:17 AM

Thanks for reply, I?ve read that tutorial before I post. Howevver, it do tells how to compress a jar file.
The question I have is how to compile two .java file stored in different packages like
rootPackage-->subPackage-->a.java
rootPackage-->subPackage2-->b.java
I want to compile a,java and b.java both and keep their hierarchy like rootPackage.subPackage.a unchanged. If I directly go into subPackage and compile a.java, I think the hierarchy is changed.
What do you think about it?

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