题解 | #数组中出现次数超过一半的数字#
数组中出现次数超过一半的数字
https://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163
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 int len = numbers.length; Map<Integer, Integer> map = new HashMap<>(); for(int i=0; i<len; i++){ int key = numbers[i]; int val = map.getOrDefault(key, 1); if(map.containsKey(key)){ val++; } if(val > len/2){ return key; } map.put(key, val); } return -1; } }