Re: Reading integer values from a txt file and save them into an array

zigbeedeep@gmail.com wrote:


Hi Sam,

The cool thing about many of the Reader and Stream objects in the
java.io package is that you can chain them together for the desired
results. Try something like this:

   public static List<Integer> getIntegersFromFile(
       String fileName) throws IOException {
     StringWriter writer = new StringWriter();
     BufferedReader reader = new BufferedReader(
         new FileReader(fileName));
     for (String line = reader.readLine(); line != null; line = reader
         .readLine()) {
       writer.write(line + " ");
     }
     StringTokenizer tokens = new StringTokenizer(writer
         .toString());
     List<Integer> list = new ArrayList<Integer>();
     while (tokens.hasMoreTokens()) {
       String str = tokens.nextToken();
       try {
         list.add(new Integer(str));
       } catch (NumberFormatException e) {
         System.out.println("Error '" + str
             + "' is not an integer.");
       }
     }
     // If you wanted an int array
     // int[] array = new int[list.size()];
     // for( int i = 0; i < array.length; i++){
     // array[i] = list.get(i);
     // }
     return list;
   }

Cheers,

Dan Andrews
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Ansir Development Limited http://www.ansir.ca
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