Some I/O problems, need help!

Question

problem 1:
i have a file a.txt
content of a.txt
12 13 15 ...integer
and i want to use an string array to store each integer
, how to know the proper size of the array to store them?
problem 2:
How do I write an integer array to a file b.txt
like this format:
13 15 16.....so on

Answer 1

You should use a LinkedList instead of an array so you can resize it when u need to...
I've modified the code from the other Thread...
import java.io.*;
import java.util.LinkedList;
public class Test
     private static BufferedReader b;
     private static FileWriter f;
     private static String s;
     private static LinkedList l;
     public Test()
     public static void main(String args[])
          try
               b = new BufferedReader(new FileReader("a.txt"));
               s = new String();
               l = new LinkedList();
               f = new FileWriter("b.txt");
          catch(IOException io)
          try
               while((s = b.readLine()) != null)
                    l.add(s);
          catch(IOException io)
          for(int i = 0;i < l.size();i++)
               try
                    s = ((String)l.get(i)) + "\n";
                    f.write(s,0,s.length());
                    f.flush();
               catch(IOException io)
}Andrew