用数组和字符串，利用随机1~9整数生成3*3的二维数组，使二维数组每行，每列、以及斜线上的数字之和均为15，并输出这个二维数组，用java实现

import java.util.Arrays;
import java.util.Random;

public class MagicSquare {
    public static void main(String[] args) {
        int[][] magicSquare = new int[3][3];
        int[] nums = {1, 2, 3, 4, 5, 6, 7, 8, 9};
        shuffle(nums);
        int index = 0;
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                magicSquare[i][j] = nums[index];
                index++;
            }
        }
        print(magicSquare);
    }

    public static void shuffle(int[] nums) {
        Random random = new Random();
        for (int i = nums.length - 1; i >= 0; i--) {
            int j = random.nextInt(i + 1);
            int temp = nums[i];
            nums[i] = nums[j];
            nums[j] = temp;
        }
    }

    public static void print(int[][] magicSquare) {
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                System.out.print(magicSquare[i][j] + " ");
            }
            System.out.println();
        }
    }
}

输出：

9 3 2 
7 5 6 
1 4 8