Where do I put the filename to be read?

I trying to use a stream tokenizer to count the number of lines in a text file using the eolIsSignificant method(). Where do I put the filename to be read? This compiles OK but of course I'm not sure while to put the file name so I it print no lines.


import java.io.*;
import java.util.*;

public class LineCounter {
  public static void main(String args[])
  {
    if (args.length == 0) {
      System.err.println("no lines");
      System.exit(1);
    }
    int lineCount = 0;
    try {
      FileReader fr = new FileReader(args[0]);
      BufferedReader br = new BufferedReader(fr);
      StreamTokenizer st = new StreamTokenizer(br);
      st.eolIsSignificant(true);
      int type;
      while ((type = st.nextToken()) != StreamTokenizer.TT_EOF) {
        if (type == StreamTokenizer.TT_EOL){
          ++lineCount;
        }
      }
      br.close();
      // Always one more line than EOLs
        if (lineCount > 0){
          ++lineCount;
        }
      }
      catch (IOException e) {
        System.err.println(e);
      }
      System.out.println("There are " + lineCount + " lines in file " + args[0]);
   }
}