java中字符出现的次数

import java.util.*;

public class Test {  

    public static void main(String args[]){ 

        String s = "abcdad"; //待测试的字符串

        Map<Character, Integer> result = getCharMaps(s);

        System.out.println(result);//打印出字符串中各字符出现的次数！



   } 

    public static Map<Character, Integer> getCharMaps(String s) {

        Map<Character, Integer> map = new HashMap<Character, Integer>();

        for(int i = 0; i < s.length(); i  ) {

            Character c = s.charAt(i);

            Integer count = map.get(c);

            map.put(c, count == null ? 1 : count   1);

        }

        return map;



    }



}