private static final Integer ONE = new Integer(1);
 public static void main(String[] args) {
  Map m = new HashMap();
  for (int i = 0; i < args.length; i++) {
   int freq = (Integer)m.get(args[i]);
   m.put(args[i], (freq==0?ONE:freq+1));
  }
  System.out.println(m.size()+"distinct words detected:");
  System.out.println(m);
 }