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;
}
}
