나누어 떨어지는 수

import java.util.*;
class Solution {
    
    public int[] answer(List<Integer> list){
        int count =0;
        if(list.isEmpty()){
            int[] answer={-1};
            return answer;
        }else{
            int[] answer = new int[list.size()];
            for(int i : list){
                answer[count] =list.get(count);
                count++;
            }
            Arrays.sort(answer);
            return answer;
        }
    }
    
    public int[] solution(int[] arr, int divisor) {
        List<Integer> list = new ArrayList<>();
        for(int i : arr){
            if(i%divisor==0){
                list.add(i);
            }
        }
        return answer(list);
    }
}