프로그래머스 Java / Ruby : 문자열 내림차순으로 배치하기

https://school.programmers.co.kr/learn/courses/30/lessons/12917

프로그래머스

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- Java

import java.util.*;
class Solution {
    public String solution(String s) {
        char[] aa = new char[s.length()];
        int a = 0;
        for(int i=0;i<s.length();i++){
            aa[i]=(char)s.charAt(i);
            if(aa[i]>='A'&&aa[i]<='Z')
                a++;
        }
        Arrays.sort(aa);
        StringBuilder sb = new StringBuilder();
        for(int i=s.length()-1;i>=0;i--)
            sb.append(aa[i]);
        return sb.toString();
    }
}

 

- Ruby

def solution(s)
    a=[]
    for i in 0..s.length-1
        a.append(s[i])
    end
    a.sort!
    a.reverse!
    ans=""
    for i in 0..s.length-1
        ans.concat(a[i])
    end
    return ans
end