Java Programming

I have a problem with mysqldump,
from console:

mysqldump - u root database opt it battles > prova.sql

it works perfectly!
but if the launch from java, printing the error stream, return this:

mysqldump: Couldn't find table: �>�

why? please dont' reply me with printstream as anothers 3d, I don't want to use that, the problem remains when I want launch mysql < file.sql

thanks