COS PRO 1급 JAVA 각 숫자가 몇개가 있나요

 

 

[소스 코드]

class Main {
    public String solution(int number) {
        String answer = "";

        int[] numberCount = new int[10];
        while(number > 0) {
            numberCount[number % 10]++;
            number /= 10;
        }

        for(int i = 9; i > 0; i--)
            if(numberCount[i] != 0)
                answer += (String.valueOf(i) + String.valueOf(numberCount[i]));
        
        return answer;
    }
}