Find with acrobat reader from java

[Eva]

Hello,
I have a java application that searchs pdf files that contain a text.
Now I have to open this files with acrobat reader and located cursor
on text that has been searched , like "find" of Acrobat Reader.
I know that I can open pdf file with

Runtime.getRuntime().exec("cmd.exe /c start prueba.pdf");

but how can I search text in document from java?
Is there any library that would be useful for it? I've tested pdfBox
and iText but they haven´t got what i need...

Thanks in advanced.