java 对角矩阵存储 java矩阵对角线元素之和

package erase;
import java.util.Scanner;
public class 二维数组求对角线元素和 {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();
        if(n%2==0)n++;
        int sum = 0;
        int m[][]=new int[n][n];
        for(int i=0;i<n;i++) {//行
            for(int j=0;j<n;j++) {//列
                if(i==j || j==n-i || i==n-j) {
                    m[i][j]=j;
                    sum+=m[i][j];
                }
            }
        }
        System.out.print("二维数组对角之和为"+sum);
    }

}