要求用while語句設(shè)計(jì)？

HashMap map=new HashMap ();

map.put("張三",80);

map.put("李四",50);

Iterator<String> iter = map.keySet().iterator();

while (iter.hasNext()) {

String key = iter.next();

int value = (Integer) map.get(key);

if(value <60){

System.out.println(key);

}

}