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  • 【面试题】给出一串字符,找出每个字符出现的次数

    package com.test;
    
    import java.util.HashMap;
    import java.util.Set;
    
    /**
     * Created by hejin on 2017/7/25 0025.
     */
    public class CountStringNum {
    
        public static void main(String[] args) {
            String codes="TT,HH,EE,YY,UU,OO,TT,HH,OO,QQ,SS,KK,OO,QQ,TT,ZZ";
            countStringNum(codes);
    
        }
    
        public static void countStringNum(String codes){
            String[] codeList = codes.split(",");
            HashMap<String, Integer> map = new HashMap();
            for (String s:codeList){
                if(map.containsKey(s)){
                    map.put(s,map.get(s)+1);
                }else{
                    map.put(s,1);
                }
    
            }
            Set<String> strings = map.keySet();
            for (String s: strings){
                System.out.println("字符"+s+"出现的次数为:"+map.get(s));
            }
    
    
        }
    }
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  • 原文地址:https://www.cnblogs.com/againn/p/7234813.html
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