Cómo iterar e imprimir enums en Java

private enum stats {
 pings, opened, closed, queueEmpty, gets, releases, timeouts;
 private int count=0;
 public void add() {
  count++;
 }
};

private String getStatsString() {
 EnumSet set = EnumSet.allOf(stats.class);
 HashMap map = new HashMap();
 for (stats stat : set) {
  map.put(stat.toString(), stat.count);
 }
 return map.toString();
}

private void logStats() {
 log.info("stats del pool: "+getStatsString());
}