Разбиение файла на слова

String[] a = str.split(" ");

StringTokenizer st = new StringTokenizer(str, "\n");
StringTokenizer st2;
while(st.hasMoreTokens()){
   st2 = new StringTokenizer(st.nextToken(), " ");
   while(st2.hasMoreTokens()){
      word = st2.nextToken();
   }
}

 String word = st2.nextToken();

private static String str = "dfg dfg fdgsddf dffds sddss werrt\nsdf sdf sdsss ssssss df";
    private static ArrayList<String> words = new ArrayList<String>();
    public static void main(String[] args) {
        StringTokenizer st = new StringTokenizer(str, "\n");
        StringTokenizer st2;
        while (st.hasMoreTokens()) {
            st2 = new StringTokenizer(st.nextToken(), " ");
            while (st2.hasMoreTokens()) {
                words.add(st2.nextToken());
            }
        }
        String[] words2 = new String[words.size()];
        words.toArray(words2);
        for (int i = 0; i < words2.length; i++) {
            System.out.println(words2[i]);
        }
    }

String[] arr = s.split(" |\n");

String s = "dfg dfg fdgsddf dffds sddss werrt\nsdf sdf sdsss ssssss df";
String[] arr = s.split("\\s");
for(int i = 0; i < arr.length; i++)
      System.out.println(arr[i]);