I used to use JavaCompiler0.8 compile windows and Linux applications under windows xp, but some feature I want it does not support(for example, Regex, UTF-16E, MacRoman encoding), and the last version called NativeJ is never free(one developer license need USD35, still does not support UTF-16 encoding).
So I decide to compile one by myself, but [...]

I have succeeded in compile it under ubuntu yesterday, but have done a test yet.
I tried to compile it use cross compiler(can output windows native program in ubuntu), but failed.
the author said, some source codes come from xpdf.
About PDFCrack
PDFCrack is a GNU/Linux (other POSIX-compatible systems should work too) tool for recovering passwords and content from [...]

Today, Manning Publications Co. sent me the finished version iText in action PDF Ebook, it is a wonderful moring.
have a look of the last page of iText in action PDF Ebook