Any way to write html form data to file?

So I'm doing an online survey of sorts. I have the following html code:

Do you think this song was written by a human or by a computer?<br />
<form name="input" action="o.jar" method="get">
<input type="radio" name="human" value="true" /> Written by human<br />
<input type="radio" name="human" value="false" /> Written by computer<br />
<input type="submit" value="Submit" />
</form>

I would like to write a java app, o.jar, that does the following:
If (human=="true") {
read a number from the file "count.dat" on the server;
increment that number;
writes it back to the file;
} Else Do Nothing;

This may be a noob question but I've never done any server-side java programming... Should I just use standard java file I/O to read and write data from the file? How do you go about getting the value of the html variable "human" into the java program?

Thanks in advance.

First, you should use equals() rather than == when comparing strings. To get the submitted value, you retrieve the values using form submission (either through GET or POST which passes key/value pairs)....depending upon the context of the server this is done through the ServletRequest object, using the getParameter method.Lots of tutorials about this online that can do a much better job than I at explaining it. You can use standard I/O, however multiple requests might cause a concurrency issue with the file. Stick the info into a database and this issue is dealt with appropriately.

PS Had to look up the project...quite interesting.