Since Gephi is developed in java, there is in fact a jar gephi file that will help you to do what you want. See the link

http://gephi.org/tag/java/

[]s

Looks like you will be parsing a big log, if that's the case, use a BufferedReader that wraps a FileReader so that you don't run out of memory as your read the input csv file.

You will be doing something like (you will have to put a few try/catch blocks wherever needed)

BufferedReader reader = new BufferedReader(new FileReader(new File("myfile.csv")));

then you will use the reader to read each line, and then you will probably split the line by whatever separator the .csv file has, usually a comma character

your main logic will look something like this:

String line = null;

while ((line = reader.readLine())!=null) {

String[] parts = line.split(","); //all the fields of each row will live inside this "parts" array

//In here you will probably have to convert some fields into numbers (integers, floats, etc, depending on what's in your log)

// and feed that data into your graph so you can perform your walk, then feed that to your Gephi objects, if Gephi gives you a java api that is, i'm not familiar with Gephi

}