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  1. import java.util.Scanner;
  2.  
  3. public class Main {
  4. 	private static Scanner in;
  5.  
  6. 	public static void main(String[] args) {
  7. 		System.out.println("Enter a number:");
  8. 		in = new Scanner(System.in);
  9. 		int size = in.nextInt();
  10. 		if(size == 1){System.out.println(1); return;}
  11.  
  12. 		int[] location = {0,0};
  13. 		int[][] field = new int[size][size];
  14. 		int count = 1; 
  15. 		int direction = 0; //0 = R, 1 = D, 2 = L, 3 = U
  16.  
  17. 		while(count <= size*size){
  18. 			field[location[0]][location[1]] = count;
  19. 			if(direction == 0){
  20. 				if(location[1] + 1 >= size){direction++;}
  21. 				else if(field[location[0]][location[1]+1] >= 1){ //If occupied
  22. 						direction++;
  23. 					}
  24. 				}
  25.  
  26. 			if(direction == 1){
  27. 				if(location[0] + 1 >= size){direction++;}
  28. 				else if(field[location[0]+1][location[1]] >= 1){ //If occupied
  29. 					direction++;
  30. 				}
  31. 			}
  32.  
  33. 			if(direction == 2){
  34. 				if(location[1] - 1 < 0){direction++;}
  35. 				else if(field[location[0]][location[1]-1] >= 1){ //If occupied
  36. 						direction++;
  37. 					}
  38. 				}
  39.  
  40. 			if(direction == 3){
  41. 				if(field[location[0]-1][location[1]] >= 1){ //If occupied
  42. 						direction = 0;
  43. 				}	
  44. 			}
  45.  
  46. 			if(direction == 0){
  47. 				location[1]++;
  48. 			}
  49. 			else if(direction == 1){
  50. 				location[0]++;
  51. 			}
  52. 			else if(direction == 2){
  53. 				location[1]--;
  54. 			}
  55. 			else if(direction == 3){
  56. 				location[0]--;
  57. 			}
  58. 		count++;
  59. 		}
  60. 		for(int y = 0; y < size;y++){
  61. 			for(int x = 0; x < size; x++){
  62. 				System.out.print(field[y][x] + " ");
  63. 			}
  64. 			System.out.println();
  65. 		}
  66. 	  }	
  67. }
Success #stdin #stdout 0.06s 4386816KB
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Enter a number:
1 2 3 4 5 
16 17 18 19 6 
15 24 25 20 7 
14 23 22 21 8 
13 12 11 10 9
https://ideone.com/Piz5Wf
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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