Newbie needs help with Streams pls

[psychohigh]

Hi my program needs to print a text file onto the terminal one line at a time. For example if I type, "java HT head -n 7 blablah.txt" it'll print the first 7 lines and if i type "java HT head -n 3 asdf.txt" itll print the first 3 lines of the txt file.

This is the code i have to print a txt file on the terminal one line at a time:

public static void printTextFile (String filename) throws IOException 
{
  FileInputStream fis = new FileInputStream(filename);
  InputStreamReader isr =  new InputStreamReader(fis); 
  BufferedReader br = new BufferedReader (isr);
  while (true) { 
    String line = br.readLine();
    if (line == null) break;
    System.out.println(line); 
  }
}

And this is my code that counts the number of lines:

public static int countLines (String filename) throws IOException 
{
  FileInputStream fis = new FileInputStream(filename);
  InputStreamReader isr =  new InputStreamReader(fis); 
  BufferedReader br = new BufferedReader (isr);
  int nlines;
  for (nlines = 0; br.readLine() != null; nlines++);
  return nlines;
}

I'm having trouble on how to combine the two to print the number of lines specified after the -n. Thanks for your help