Help:FileWriter gives no output

Question

Hi:
The following code gives no errors but also no output. I know that the encrypt method works because I am able to print the output to screen but I cannot get FileWriter to work.
Can someone help me with this problem?
Thanks.
import java.io.*;
class Monoalphabet
  public static void main(String args[])
  String keyword = args[0];
  char [] cypher;
  cypher = makeCypher(removeDups(keyword));     
  try
   FileReader f = new FileReader(args[1]);
   FileWriter f1 = new FileWriter(args[2]);
   encrypt(f,f1,cypher);
    catch(Exception e)
      System.out.println("Exception: " + e);
  public static void encrypt(FileReader reader,FileWriter writer, char[] cypher )
     int positionOfA = 'a';
     String outgoing = ""; 
     String temp = "";
     BufferedReader infile  = new BufferedReader(reader);
     try {
     while(( temp = infile.readLine()) != null)
          for (int k = 0; k < temp.length(); k++)
          char whatever = temp.charAt(k);
          char ch = cypher[(int)whatever -  positionOfA];
          String chs = new Character (ch).toString();
           outgoing = outgoing + chs;
           System.out.println(outgoing);    
         writer.write(outgoing);   
    catch(Exception e)
      System.out.println("Exception: " + e);
  public static String removeDups(String keyword)
  { String keep = "";
    keyword = keyword + "zyxwvutsrqponmlkjihgfedcba";
   for(int i = keyword.length()-1; i > -1 ; i--)
   if(i == keyword.indexOf(keyword.charAt(i)))
    keep = keyword.charAt(i)+ keep;
    return keep; 
  public static  char[] makeCypher(String remove)
      char Array [];
      Array = remove.toCharArray();
      return Array;

Answer 1

You may want to try flushing your FileWriter when you are done.
FileWriter f1 = null;
FileReader f = null;
try {
   f = new FileReader(args[1]);         
   f1 = new FileWriter(args[2]);  
   encrypt(f,f1,cypher);                    
} catch(Exception e) {     
  System.out.println("Exception: " + e);   
} finally {
  if (f1 != null) {
     try {
       f1.flush();
       f1.close();
     } catch (Exception e) {}
  if (f != null) {
     try {
       f.close();
     } catch (Exception e) {}