Map的遍历

@Testpublic void mm(){  Map<String, String> map = new HashMap<>();    map.put("a", "aa");    map.put("b", "bb");     Set<Entry<String, String>> mm=   map.entrySet(); for(Entry<String, String> entry : mm){ String m=entry.getKey(); System.out.println(map.get(m)); System.out.println(entry.getValue()); }}