Reading text file(array of 2d) and putting in a int array , help required.

Question

import java.io.*;
import java.util.*;
public class lastphase
     public static int[][] getData(File f) throws IOException {
          ArrayList line = new ArrayList();
          BufferedReader br = new BufferedReader(new FileReader(f));
          String s = null;
          while ((s = br.readLine()) != null)
               line.add(s);
          int[][] map = new int[line.size()][];
          for (int i = 0; i < map.length; i++) {
               s = (String) line.get(i);
               StringTokenizer st = new StringTokenizer(s, " ");
               int[] arr = new int[st.countTokens()];
               for (int j = 0; j < arr.length; j++)
                    arr[j] = Integer.parseInt(st.nextToken());
               map[i] = arr;
          return map;
     public static void main(String[] args) throws Throwable {
          int[][] map = getData(new File(args[0]));
          for (int i = 0; i < map.length; i++) {
               for (int j = 0; j < map.length; j++)
                    System.out.print(map[i][j] + " ");
               System.out.println();
here is code but when i run java lastphase it gives error stating
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at lastphase.main(lastphase.java:37)
can anybody tell whys dat case and where i need to change the code

Answer 1

In my endevor to complete my work i got my answer
thanks people for sharing ur knowldeg with usCare to share your solution to the mentioned problem?
kind regards,
Jos
ps. I just browsed through your code, but couldn't find an obvious 'blooper' ;-)