[프로그래머스] n의 배수 고르기

import java.util.*;
class Solution {
    public static int[] solution(int n, int[] numlist) {
	
	        List<Integer> list=new ArrayList<>();
	        for (int i = 0; i < numlist.length; i++) {
	        	if(numlist[i]%n==0) {
	        		list.add(numlist[i]);
	    	        	}
			}
	    	int[] answer=new int[list.size()];
			for (int i = 0; i < list.size(); i++) {
				answer[i]=list.get(i);
			}
	    	return answer;
		
	    }
}

 

 

ArrayList -> 배열

1)반복문

int[] answer=new int[list.size()];
			for (int i = 0; i < list.size(); i++) {
				answer[i]=list.get(i);
			}

2)toArray

	    	int[] answer=list.stream().mapToInt(Integer::intValue).toArray();