[프로그래머스/JAVA] 배열 두 배 만들기

class Solution {
    public int[] solution(int[] numbers) {
        int[] answer = new int[numbers.length];
        
        for(int i=0; i<numbers.length; i++){
            answer[i] = 2*numbers[i];
        }
        
        return answer;
    }
}

 

다른 풀이

import java.util.*;

class Solution {
    public ArrayList solution(int[] numbers) {
        ArrayList<Integer> answer = new ArrayList<>();

        for(int num : numbers){
            answer.add(num*2);
        }

        return answer;
    }
}