import java.util.HashMap;

 import java.util.Map;

 import java.util.Scanner;

 /**

  * 目标 : 输出一个字符串中每个字符出现的次数.(经典面试题).

  *

  * @author Administrator

  *

  */

 public class MapDemo01 {

     public static void main(String[] args) {

         // TODO Auto-generated method stub

 //        1 键盘录入一个字符串

         Scanner name = new Scanner(System.in);

         System.out.println("请您输入一个字符串: ");

         String contest = name.nextLine();

 //        2 定义map集合,

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

 //        3 遍历字符串中的每一个字符

 //        datas=aabbccddaa123

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

             char ch = contest.charAt(i);

             if (ele.containsKey(ch)) {

                 ele.put(ch, ele.get(ch) + 1);

             } else {

                 ele.put(ch, 1);

             }

         }

         System.out.println("结果为: " + ele);

     }

 }