Appending new TextLine into existing file

Question

I tried to add new text lines into an existing txt file. The problem is my method add new Strings on the same line (to see it you need to open the output file with notepad).
The method invoked is:
public static void addText( String arg0, String path ) {
          long pos;          
          try {
               raf = new RandomAccessFile( path , "rw" );
               pos = raf.length();
               raf.seek( pos ); //mi sposto alla fine del file
               raf.writeBytes( "\n" ); // new line
               raf.writeBytes(arg0); //
               raf.close();
          } catch (FileNotFoundException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
     }

Answer 1

To make your app system-independent use:
  String lineSeparator = System.getProperty("line.separator");as line separator
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