题解 | #蛇形矩阵#

找规律法

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        //横向从1开始，加2，加3，加4，加n        
        int start1 = 1;
        int step1 =2;
        //竖向从1开始，加1，加2，加3，加n-1
        int start2 = 1;
        int step2 = 1;
        for(;step2<=n;step2++){
            System.out.print(start2+" ");
            step1 = step2+1;
            start1 = start2;
            while(step1<=n){
                System.out.print(start1+step1+" ");
                start1 = start1+step1;
                step1++;
            }
            start2 = start2+step2;
            System.out.println();
        }
    }
}

模拟二维数组法

数据的走向是斜向右上角，每次从左下角开始，往右上角依次增加,横纵坐标的变化分别为 列号从0开始依次加1，加到n-1 行号从1，2，3...n-1每次减1，减到0

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[][] array = new int[n][n];
        int num = 1,count=1;
      //构造二维数组
        while (count<= n) {
            for (int i = count-1, j = 0; i >=0 && j<count;) {
                array[i--][j++] = num;
                num++;
            }
            count++;
        }
      //遍历二维数组
        for(int i =0;i<n;i++){
            for(int j=0;j<n;j++){
                if(array[i][j] > 0){
                    System.out.print(array[i][j] + " ");
                }
            }
             System.out.println();
        }
    }
}