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();
        }
        
    }

}