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  1. import java.util.Random;
  2.  
  3. class Ideone
  4. {
  5. 	static final int width = 20, height = 10;
  6. 	static final int rooms = 30;
  7.  
  8. 	static boolean[][] room = new boolean[width][height];
  9.  
  10. 	static int neighborCount(int x, int y) {
  11. 		int n = 0;
  12. 		if (x > 0 && room[x-1][y]) n++;
  13. 		if (y > 0 && room[x][y-1]) n++;
  14. 		if (x < width-1 && room[x+1][y]) n++;
  15. 		if (y < height-1 && room[x][y+1]) n++;
  16. 		return n;
  17. 	}
  18.  
  19. 	public static void main (String[] args)
  20. 	{
  21. 		room[width/2][height/2] = true;
  22. 		Random r = new Random();
  23. 		int x, y, nc;
  24. 		for (int i = 0; i < rooms; i++) {
  25. 			while (true) {
  26. 				x = r.nextInt(width);
  27. 				y = r.nextInt(height);
  28. 				nc = neighborCount(x, y);
  29. 				if (!room[x][y] && nc == 1) break;
  30. 			}
  31. 			room[x][y] = true;
  32. 		}
  33. 		for (y = 0; y < height; y++) {
  34. 			for (x = 0; x < width; x++)
  35. 				System.out.print(room[x][y] ? "[]" : "  ");
  36. 			System.out.println();
  37. 		}
  38. 	}
  39. }
Success #stdin #stdout 0.11s 320576KB
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Standard input is empty
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                          []            
                  []  [][][]            
            [][][][]  []                
                  []  []                
            [][][][][][][]              
                  []  []  []            
                  []  [][][][][]        
                        []              
                      [][]
https://ideone.com/Zw2dbS
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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