按照以往的习惯以为和最起码大于0,没想到测试的时候这道题还能出个小于0的,所以稍微改了改以前的代码,将sum的初始值置为A[0],就可以了

import java.util.*;

public class MaxSum {
    public int getMaxSum(int[] A, int n) {
        // write code here
        int sum = A[0];
        int temp = 0;
        for (int i = 0; i < n; i++) {
            if (temp > 0) {
                temp += A[i];
            } else {
                temp = A[i];
            }
            if (sum < temp) {
                sum = temp;
            }
        }
        return sum;
    }
}