Adding License Info to Java Files

[jd99]

Hi,.. i need to put the contents of a file (i.e., header.txt) into the beginning of all the .java files in a directory (multiple levels deep so needs to be recursive)... as i want to add the license information to a large project automatically.

I was thinking this could be done with a script (not exactly sure how) unless anyone knows of any better ways? I thought the open source community must have a method of doing this?

thanks