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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone {
  9.  
  10. 	public static void main (String[] args) throws java.lang.Exception {
  11.  
  12. 		int width;
  13. 		int height;
  14. 		List<char[]> map;
  15.  
  16. 		// pretend this is opening the real file, i just had to embed the data
  17. 		// as a string because ideone.
  18. 		BufferedReader br = new BufferedReader(new StringReader(mapFileData));
  19.  
  20. 		// initialize
  21. 		width = 0;
  22. 		map = new ArrayList<char[]>();
  23.  
  24. 		String line;
  25. 		while ((line = br.readLine()) != null) {
  26. 			// optional: skip blank lines:
  27. 			if (line.length() == 0)
  28. 				continue;
  29. 			// optional: verify that all lines are same length:
  30. 			if (width == 0)
  31. 				width = line.length();
  32. 			else if (line.length() != width)
  33. 				throw new Exception("lines are not all the same length.");
  34. 			// this is the only thing you really *need* to do:
  35. 			map.add(line.toCharArray());
  36. 		}
  37.  
  38. 		height = map.size(); // height is number of lines
  39.  
  40. 		System.out.printf("size: %d x %d\n", width, height);
  41. 		for (int y = 0; y < height; ++ y) {
  42. 			System.out.printf("%3d: ", y);
  43. 			for (int x = 0; x < width; ++ x)
  44. 				System.out.print(map.get(y)[x]);
  45. 			System.out.println();
  46. 		}
  47.  
  48. 	}
  49.  
  50. 	static String mapFileData = 
  51.        "#########################\n" +
  52.        "#.......................#\n" +
  53.        "#......#................#\n" +
  54.        "########................#\n" +
  55.        "#......#................#\n" +
  56.        "#......#................#\n" +
  57.        "#......#................#\n" +
  58.        "#.######................#\n" +
  59.        "#.......................#\n" +
  60.        "#########################\n";
  61.  
  62. }
Success #stdin #stdout 0.05s 711168KB
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Standard input is empty
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size: 25 x 10
  0: #########################
  1: #.......................#
  2: #......#................#
  3: ########................#
  4: #......#................#
  5: #......#................#
  6: #......#................#
  7: #.######................#
  8: #.......................#
  9: #########################
https://ideone.com/K6s6NQ
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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