로또의 최고 순위와 최저 순위 - Java8

import java.util.Arrays;

public class Solution {
    public int[] solution(int[] lottos, int[] win_nums) {
        int zeroCount = 0;
        Arrays.sort(lottos);
        Arrays.sort(win_nums);

        for (int t : lottos) {
            if (t == 0) {
                zeroCount++;
                continue;
            } else {
                break;
            }
        }

        int winCount = 0;
        int myIdx = 0;
        int winIdx = 0;
        while (true) {
            if (lottos[myIdx] == win_nums[winIdx]) {
                winCount++;
                myIdx++;
                winIdx++;
            } else if (lottos[myIdx] > win_nums[winIdx]) {
                winIdx++;
            } else if (lottos[myIdx] < win_nums[winIdx]) {
                myIdx++;
            } else {
                throw new RuntimeException("LOGIG ERROR");
            }

            if ((myIdx >= 6) || (winIdx >= 6)) {
                break;
            }
        }
        int[] answer = new int[2];
        answer[0] = countToRank(zeroCount + winCount);
        answer[1] = countToRank(winCount);
        return answer;
    }

    private int countToRank(int count) {
        if (count >= 2) {
            return 7 - count;
        } else {
            return 6;
        }
    }

    public static void main(String[] args) {
        Solution s = new Solution();
        int[] ret = s.solution(new int[]{44, 1, 0, 0, 31, 25}, new int[]{31, 10, 45, 1, 6, 19});
        System.out.println(Arrays.toString(ret));
        // expected : [3, 5]
    }
}