24. 정수 내림차순으로 배치하기

import java.util.Arrays;
class Solution {
    public long solution(long n) 
    {
        char[] charArray = String.valueOf(n).toCharArray();
    	Arrays.sort(charArray);
    	char[] temp = new char[charArray.length];
    	
    	for( int i = 0; i < charArray.length; i++)
    	{
    		temp[i] = charArray[charArray.length-i-1];    		
    	}
        long answer = Long.parseLong(String.valueOf(temp));;
        return answer;
    }
}