Java循环HashMap方法

Map map = new HashMap();
Iterator iter = map.entrySet().iterator();
while (iter.hasNext()) {
    Map.Entry entry = (Map.Entry) iter.next();
    Object key = entry.getKey();
    Object val = entry.getValue();
}

Map map = new HashMap();
Iterator iter = map.keySet().iterator();
while (iter.hasNext()) {
　Object key = iter.next();
  Object val = map.get(key);
}