java - 程序提示数组大小然后将不在边缘的所有数字相加

Question

如何制作一个程序，提示数组大小并用随机数填充，然后将不在边缘的数字全部相加？

代码如下:

import javax.swing.*;

public class array {

    int matrizNN[][];
    public void setMatrizNN(int n){

        matrizNN = new int[n][n];

        for (int i = 0; i < matrizNN.length; i++) {
                for (int j = 0; j < matrizNN[i].length; j++) {
                    matrizNN[i][j]= (int)(Math.random()*10);
                    System.out.print(" "+matrizNN[i][j]);
        }

        System.out.println(" ");
    }

}

Answer 1

import javax.swing.*;
public class array {

int matrizNN[][];
public void setMatrizNN(int n){

    matrizNN = new int[n][n];

    for (int i = 0; i < matrizNN.length; i++) {
            for (int j = 0; j < matrizNN[i].length; j++) {
                matrizNN[i][j]= (int)(Math.random()*10);
                System.out.print(" "+matrizNN[i][j]);
    }

    System.out.println(" ");
System.out.println("Size "+matrizNN.Length);

}

}