FileReader & PrintWriter

Can a FileReader object get written twice? I just create a file using PrintWriter with a FileReader object as its argument. Result of that is a file created. Then i need to write something to that file which just created. So i create a printWriter object again with that FileReader object. But that doesnt work. Can someone help?

public void writeFile(FileReader in) throws java.io.IOException
    {
          
          PrintWriter out = new PrintWriter(writer);
          
          BufferedReader inFile = new BufferedReader(in);
          String line =null;
         
         int j = 1;
         while ((line = inFile.readLine())!= null)
          {
                 out.println(j+ " :   " + line);
                 j++;
           }
           out.println("");
           out.println("");
          
          inFile.close();
            out.close();

    }

so I first call
writeFile(inFile);
then i do:

PrintWriter err = new PrintWriter(parser.writer);
            // add any error messages to the listing file...

                for (int i=0; i<parser.errors.size(); i++)
                 {
                       String k = (String)parser.errors.get(i);
                       err.println(k);
                 }
               
                err.close();

the problem is nothing being added to the file which just created.