题解 | #数组中出现次数超过一半的数字#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     *
     * @param numbers int整型一维数组
     * @return int整型
     */
    public int MoreThanHalfNum_Solution (int[] numbers) {
        // write code here
        HashMap<Integer, Integer> map = new HashMap<>();
        int n = numbers.length / 2;
        int res = -1;
        for (int num : numbers) {
            map.put(num, map.getOrDefault(num, 0) + 1);
            if (map.get(num) > n) {
                res = num;
                break;
            }
        }
        return res;
    }
}