Help with 2D array input using a text file

Question

I'm writing a JAva program using BlueJ, which requires me to read info from a text file and put them into an 2D array. I got this error msg and I couldn't gifure out how to fix it. Please help me. Thanks a lot. The program is due tomorrow, please help.
Error message:
NoSuchElementException:
null(in Java.util.StringTokenizer)
Here's the program with the line where the problem is highlighted
import java.io.*;
import java.util.StringTokenizer;
public class ***
// Reads students' test scores from a file and calculate their final grade
public static void main (String[] args) throws IOException
String file1 = "C:/Temp/scores.txt";
int[][] input = new int[25][5];
StringTokenizer tokenizer;
String line;
FileReader fr = new FileReader (file1);
BufferedReader inFile = new BufferedReader (fr);
line = inFile.readLine();
tokenizer = new StringTokenizer (line);
for (int row = 0; row < 25; row++)
for (int col = 0; col < 5; col++)
input[row][col] = Integer.parseInt(tokenizer.nextToken()); --> porblem
This is what the text file looks like:
1 74 85 98
2 97 76 92
3 87 86 77
4 73 85 93
5 99 99 83
6 82 84 95
7 78 83 91
8 84 79 84
9 83 77 90
10 75 78 87
11 98 79 92
12 70 73 95
13 69 80 88
14 81 77 93
15 86 72 80
16 70 76 89
17 71 71 96
18 97 81 89
19 82 90 96
20 95 85 95
21 91 82 88
22 72 94 94

Answer 1

Try this code..(I've tested this code in my machine and it works fine)
          try {
               FileReader fileReader = new FileReader("Z:\\fileInput.txt");
               BufferedReader reader = new BufferedReader(fileReader);
               int[][] fileData = new int[22][4];
               StringTokenizer tokenizer = null;
               String line = reader.readLine();
               int rowCount = 0;
               while(line != null) {
                    tokenizer = new StringTokenizer(line, " ");
                    int columnCount = 0;
                    while(tokenizer.hasMoreTokens()) {
                         fileData[rowCount][columnCount] = Integer.valueOf(tokenizer.nextToken()).intValue();
                         columnCount++;
                    line = reader.readLine();
                    rowCount++;
               fileReader.close();
               System.out.println("Done");
          } catch (FileNotFoundException fnfe) {
               System.out.println("File not found " + fnfe);
          } catch (IOException ioe) {
               System.out.println("IO Exception " + ioe);
The problem with your code is that you should first check whether there are any tokens before doing nextToken().
-Amit