Java——九宮格を印刷する(奇数行方陣)

package com.zth;
import java.util.Scanner;
/**
 *     
 *8   1   6  
 *3   5   7  
 *4   9   2 
 *
 *    ：          1 ，  “  、   ”      
 * @author   ·  
 *
 */

public class JiuGongGe {

  public static void main(String[] args) {
    //       n ,  n*n   
    int length;
    
    System.out.print("         (      ):");
    Scanner scanner = new Scanner(System.in);
    length = scanner.nextInt();
    scanner.close();
    
    //     
    int[][] arr= new int[length][length];
    //        
    int i = 0;
    int j = length/2 ;
    arr[i][j] = 1;
    //   2~n*n   
    for(int n = 2;n<=length*length;n++) {
      //      
      i = (i-1+length)%length;
      //     
      j = (j+1+length)%length;
      //           
      if(arr[i][j] ==0) {
        arr[i][j] = n;      //     
      }else {               //    
        //      
        i = (i+1+length)%length;
        //      
        i = (i+1+length)%length;
        //     
        j = (j-1+length)%length;
        arr[i][j] = n;
      }
    }
    
    //      
    for (int x = 0; x < length; x++) {
      for (int y = 0; y < length; y++) {
          System.out.print(arr[x][y]+"\t");
      }
      System.out.println();
  }
  }

}

実行結果:

         (      ):3
8	1	6	
3	5	7	
4	9	2	

         (      ):5
17	24	1	8	15	
23	5	7	14	16	
4	6	13	20	22	
10	12	19	21	3	
11	18	25	2	9