제일 작은 수 제거하기★★→getAsInt(), min(), filter(i-> i !=min)

나의 풀이 

import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
class Solution {
        public int[] solution(int[] arr) {
            int min = 200000000;
            int minIndex = 0;
            for (int i = 0; i < arr.length; i++) {
                if (arr[i] < min) {
                    min = arr[i];
                    minIndex = i;
                }

            }
            List<Integer> result = IntStream.of(arr)    // IntStream
                    .boxed()
                    .collect(Collectors.toList());
            result.remove(minIndex);
            if (arr.length == 1) {
                return new int[]{-1};
            }

            return result.stream()
                    .mapToInt(Integer::intValue)
                    .toArray();
        }
}

 

 

 

 

다른 사람의 풀이 

import java.util.Arrays;
import java.util.stream.Stream;
import java.util.List;
import java.util.ArrayList;

class Solution {
  public int[] solution(int[] arr) {
      if (arr.length <= 1) return new int[]{ -1 };
      int min = Arrays.stream(arr).min().getAsInt();
      return Arrays.stream(arr).filter(i -> i != min).toArray();
  }
}