A diamond graphic _java with a magic square and character composed of Java print numbers

Print the Magic square

Enter a natural number N (2≤n≤9), which requires the output of the following magic square, that is, the length of the n*n, the element value is 1 to n*n,1 in the upper left corner, in turn, in the clockwise direction of the elements. When n=3:

   1  2  3  
   8  9  4 7 6 5 

Input form reads an integer n from the standard input.
The output form prints the results to the standard output. The output matches the required phalanx, each number is 5 characters wide, aligned to the right, and a carriage return is output at the end of each line.
"Input Sample" 4
"Output Sample"

  1  2  3  4  5  /6 9 8  7

Realize:

Package Cn.dfeng; 
Import Java.util.Arrays; 
Import Java.util.Scanner; 
  public class Maze {enum direction{up, down, right, left; 
    } public int[][] Buidmaze (int n) {int[][] maze = new Int[n][n]; 
    For (int[] a:maze) {Arrays.fill (A, 0); 
    int col = 0; 
    int row = 0; 
    int counter = 1; 
     
    Direction d = direction.right; 
         
        while (true) {if (maze[row][col] = = 0) {Maze[row][col] = counter++; Switch (d) {case Right:if (col + 1< n && maze[row][col + 1] = = 0) {Co 
            L + +; 
              }else{d = direction.down; 
            Row + +; 
          } break; 
            Case Down:if (row + 1 < n && maze[row + 1][col] = = 0) {row + +; 
              }else{d = direction.left; 
            Col--; 
          } break; Case Left:if ( Col-1 >= 0 && maze[row][col-1] = = 0) {col-; 
              }else{d = direction.up; 
            Row--; 
          } break; 
            Default:if (row-1 >= 0 && maze[row-1][col] = = 0) {row-; 
              }else{d = direction.right; 
            Col + +; 
        } break; 
      }}else{break; 
  } return maze; public void Printmaze (int[][] maze) {for (int[] row:maze) {for (int i:row) {Sy 
      stem.out.printf ("%3d", I); 
    } System.out.println (); }/** * @param args */public static void main (string[] args) {Scanner sc = new Scanner (Sys 
    tem.in); 
    SYSTEM.OUT.PRINTLN ("Please input the size of the Maze:"); 
    int size = Sc.nextint (); 
    Maze Maze = new Maze (); 
    int[][] m = maze.buidmaze (size); Maze.prinTmaze (m); 

 } 
}

Print a diamond graphic

The effect of a diamond chart is probably this:

Now let's look at the code

Package Cn.dfeng; 
/** 
 * This class can use * print size diamond graphics 
 * @author Dfeng * * */Public 
class Drawer { 
   
  /** 
   * Print Diamond Graphics 
   * param n Diamond Size 
   */public 
  void Printdiamond (int n) { 
    System.out.println (); 
    int i = 0; 
    Boolean flag = true; 
    while (I >= 0) { 
      if (I < n) {for 
        (int j = 0; J < N-i; J +) 
          {System.out.print (""); 
        } For 
        (int j = n-i; J <= N + i; j + + 2) { 
          System.out.print ("*"); 
        } 
        System.out.println (); 
      } 
      if (i = = N) { 
        flag = false; 
        i--; 
      } 
      if (flag) { 
        i++}} 
      else { 
        i--; 
      } 
}}}