统计一字符串中，重叠字符出现的次数

package com.example.demo.lettcode;
import java.util.HashMap;
import java.util.Map;
/**
 * 统计一串字符中，重叠字符出现的次数
*/
public class RepeatStr {
    public static void main(String[] args) {
        repeatStr("AAABBBCCA");
    }
    public static void repeatStr(String str){
        char[] charArray = str.toCharArray();
        Map<Character,Integer> resultMap = new HashMap<>();
        for (int i = 0; i < charArray.length; i++) {
            char value = charArray[i];
            Integer count = resultMap.get(value);
            if (count==null){
                resultMap.put(value,1);
            }else{
                count = count+1;
                resultMap.put(value,count);
            }
        }
        // 循环遍历map
        for (Map.Entry<Character,Integer> entry:resultMap.entrySet()) {
            Character key = entry.getKey();
            Integer value = entry.getValue();
            System.out.println(key+"--出现的次数为--"+value);
        }
    }
}