map中key值相等 对应value值加1

public static void main(String[] args) {
Map<String, List<String>> input = new HashMap<String, List<String>>();
List<String> list = new ArrayList<String>();
list.add("《狂人日记》");
list.add("《狂人日记》");
list.add("《狂人日记》");
list.add("《狂人日记》");
input.put("小王", list);
Map<String, Map<String, Integer>> maplist = add(input);
System.out.println(maplist.get("小王").get("《狂人日记》"));
}
public static Map<String, Map<String, Integer>> add(
Map<String, List<String>> input) {
Map<String, List<String>> maplist = new HashMap<String, List<String>>();
Map<String, Integer> temp = new HashMap<String, Integer>();
temp.put("《狂人日记》", 0);
Map<String, String> map = new HashMap<String, String>();
map.put("小王", "《狂人日记》");
Map<String, Map<String, Integer>> map2 = new HashMap<String, Map<String, Integer>>();
map2.put("小王", temp);
Set<String> names = map2.keySet();
Set<String> names2 = input.keySet();
for (String str : names) {
for (String str2 : names2) {
if (str.equals(str2)) {
for (String str3 : input.get(str2)) {
temp.put(str3, map2.get(str).get(str3) + 1);
map2.put(str, temp);
}
}
}
}
return map2;
}