Some statistics about Java source code of popular open source libraries. Currently I am looking/learning a big system that has multi-million number of source code. I wrote a simple utility to extract information about the java source code just for fun. I ran this utility on many of "src" directory of open source libraries as well.This java utility takes a source code directory as inputs & traverses all the java code recursively inside that directory. It collects total number of active lines of code excluding comments, package count... 

& here is the result.

********* JDK1.5 ********

Total # Lines = 850918

Total # of Files = 6556

Avg # Lines per file = 129

Total # of packages = 368

******** Hadoop 0.18.3 ******

Total # Lines = 129742

Total # of Files = 926

Avg # Lines per file = 140

Total # of packages = 66

******* Lucene 2.4.1 *********

Total # Lines = 69606

Total # of Files = 528

Avg # Lines per file = 131

Total # of packages = 16

******** Struts *********

Total # Lines = 63707

Total # of Files = 1040

Avg # Lines per file = 61

Total # of packages = 120

********* iText 2.1.5 ***********

Total # Lines = 96830

Total # of Files = 544

Avg # Lines per file = 177

Total # of packages = 55

******* Tapestry 5.1.0.3 ******

Total # Lines = 96395

Total # of Files = 1937

Avg # Lines per file = 49

Total # of packages = 103

It's not all surprising that one of the best prolific java coder comes best ("Howard") in the java world when it it comes to modularity.

********* iBatis *********

Total # Lines = 14132

Total # of Files = 202

Avg # Lines per file = 69

Total # of packages = 45

***** Hibernate 3.3.1.GA *******

Total # Lines = 173698

Total # of Files = 2102

Avg # Lines per file = 82

Total # of packages = 292

I guess these figures can be considered as standard while reviewing the modularity of any library.Do let me know if any one interested in code & having ANT target to analyze the

 source code b/w releases.