java程序，提示数组大小，然后添加所有不在边缘的数字

Question

如何制作一个程序，提示数组的大小并用随机数填充，然后添加所有不在边缘的数字

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);

}

}

Answer 2

   public static 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(" ");
        } 
        int sum=0;
        System.out.println("=========================");
        for (int i = 1; i < matrizNN.length-1; i++) {
            for (int j = 1; j < matrizNN[i].length-1; j++) {
                //System.out.print(matrizNN[i][j]);
              sum+=matrizNN[i][j];
       }
    }
        System.out.println("sum is :"+sum);
    }

如果你还没有找到解决方案，这里是代码。希望这就是你想要的

Answer 3

你似乎对如何填充matrizNN[][]有了想法。要添加非边值，可以使用一组类似的for循环，但省略第一个和最后一个值。以下是基本想法：

int centerTotal = 0;

for (int i = 1; i < matrizNN.length - 1; i++) {
     for (int j = 1; j < matrizNN[i].length - 1; j++) {
          centerTotal += matrizNN[i][j];
     }
}

System.out.println(centerTotal);