一道打印M的面试题

 public class Demo {

     /**
      * 平面图形题（二维数组）
      */
     public static void main(String[] args) {

         int num = 25;

         int hight = num/4+1;
         int width = num;

         int arr[][] = new int[hight][width];

         int x=hight-1;
         int y=0;

         boolean order = false;
         for(int i=1;i<=num;i++){
             arr[x][y] = i;
             y++;

             if(order==false){
                 x--;
             }
             if(order==true){
                 x++;
             }

             if(x<0){
                 order = true;
                 x=x+2;
             }

             if(x>hight-1){
                 order =false;
                 x=x-2;
             }
         }

         for(int i=0;i<arr.length;i++){
             for(int j=0;j<arr[i].length;j++){
                 if(arr[i][j]==0){
                     System.out.print(" ");
                 }else{
                     System.out.print(arr[i][j]);
                 }
             }
             System.out.println();
         }

     }

 }