生成一个二维数组：要求数据随机

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package cn.xiaoxie.javastudy;

import java.util.Random;

public class RandomTwoDimenArray {
    public static void main(String[] args) {
        // 1.定义一维数组
        int[] oneDimenArray1 = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
        // 2.打乱一维数组数据
        // 遍历数组，得到每一个元素，拿着每一个元素跟随机索引上的数据进行交换
        Random r = new Random();
        for (int i = 0; i < oneDimenArray1.length; i++) {
            // 获取到随机索引
            int index = r.nextInt(oneDimenArray1.length);
            // 拿着遍历到的数据和随机索引上的数据进行交换
            int temp = oneDimenArray1[i];
            oneDimenArray1[i] = oneDimenArray1[index];
            oneDimenArray1[index] = temp;
        }
        // 3.遍历数组
        System.out.print("[");
        for (int i = 0; i < oneDimenArray1.length - 1; i++) {
            System.out.print(oneDimenArray1[i] + ",");
            if (i == oneDimenArray1.length - 2)
                System.out.print(oneDimenArray1[i + 1]);
        }
        System.out.println("]");

        // 4.创建一个二维数组
        int[][] twoDimenArray = new int[4][4];

        // 5.给二维数组添加数据
        // 解法一：遍历一维数组
        for (int i = 0; i < oneDimenArray1.length; i++) {
            twoDimenArray[i / 4][i % 4] = oneDimenArray1[i];
        }

        // 解法二：遍历二维数组
        int index = 0;
        for (int i = 0; i < twoDimenArray.length; i++) {
            for (int j = 0; j < twoDimenArray[i].length; j++) {
                twoDimenArray[i][j] = oneDimenArray1[index];
                index++;
            }
        }

        // 6.打印二维数组
        for (int i = 0; i < twoDimenArray.length; i++) {
            for (int j = 0; j < twoDimenArray[i].length; j++) {
                System.out.print(twoDimenArray[i][j] + " ");
            }
            System.out.println();

        }

    }

}