每日总结

java

package com.tay;

import java.util.Random;

public class Test {
    public static void main(String[] args) {
        //把一个一维数组0-15打乱
        //然后按照四个一组放到二维数组里
        //1、定义一个一维数组
        int[] tempArr = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
        //打乱数组中数据的顺序
        Random r = new Random();
        for (int i = 0; i < tempArr.length; i++) {
            int index = r.nextInt(tempArr.length);
            int temp = tempArr[i];
            tempArr[i] = tempArr[index];
            tempArr[index] = temp;
        }
        for (int i = 0; i < tempArr.length; i++) {
            System.out.print(tempArr[i] + " ");
            
        }
        System.out.println();
        //创建二维数组
        int[][] data = new int[4][4];
        //给二维数组添加数据
        for (int i = 0; i < tempArr.length; i++) {
            data[i / 4][i % 4] = tempArr[i];
        }
        //遍历二维数组
        for (int i = 0; i < data.length; i++) {
            for (int j = 0; j < data[i].length; j++) {
                System.out.print(data[i][j] + " ");
            }
            System.out.println();
        }
    }
}