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    <p>This is how I would do it. You have up to 2^48 different games which you can replay by using the same seed. This avoids the need to read files or store an index in memory. You can recreate any board game as required.</p> <pre><code>public class Baord { private static final int[] SHIP_SIZES = {4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1}; public static final char EMPTY = '.'; private final Random random; private final char[][] grid; private char letter = 'a'; private final int width; private final int height; public Baord(int height,int width, int seed) { this.width = width; this.height = height; this.random = new Random(seed); this.grid = new char[height][width]; for (char[] chars : grid) Arrays.fill(chars, EMPTY); for (int len : SHIP_SIZES) placeShip(len); } private void placeShip(int len) { OUTER: while (true) { if (random.nextBoolean()) { // across int x = random.nextInt(width - len + 1); int y = random.nextInt(height); for (int j = Math.max(0, y - 1); j &lt; Math.min(height, y + 2); j++) for (int i = Math.max(0, x - 1); i &lt; Math.min(width, x + len + 2); i++) if (grid[j][i] &gt; EMPTY) continue OUTER; for (int i = 0; i &lt; len; i++) grid[y][x + i] = letter; } else { // down int y = random.nextInt(height - len + 1); int x = random.nextInt(width); for (int j = Math.max(0, x - 1); j &lt; Math.min(width, x + 2); j++) for (int i = Math.max(0, y - 1); i &lt; Math.min(height, y + len + 2); i++) if (grid[i][j] &gt; EMPTY) continue OUTER; for (int i = 0; i &lt; len; i++) grid[y + i][x] = letter; } break; } letter++; } public String toString() { StringBuilder ret = new StringBuilder(); for (int y = 0; y &lt; grid.length; y++) ret.append(new String(grid[y])).append("\n"); return ret.toString(); } public static void main(String... args) { for (int i = 0; i &lt; 3; i++) System.out.println(new Baord(8, 16, i)); } } </code></pre> <p>prints</p> <pre><code>..........ddd... .....aaaa....... eee.......j..... .............i.. ..bbbb.......i.c .......g.......c .k.h...g...f...c ...h.......f.... ii.............. .....ccc..ff...b ...............b aaaa...........b .........j..h..b ....gg......h... ..............k. eee..ddd........ .d.....eee.....f .d.............f .d.............. ......j.ccc....g .............b.g .............b.. h.i..........b.. h.i...aaaa.k.b.. .......h....aaaa .......h........ .e.........ccc.. .e.............. .e.bbbb...ii..ff ........d....... .g..j...d....... .g......d.....k. ............ccc. .....bbbb....... .ii.......k..d.. .....f.......d.. eee..f.......d.. ................ .j.g........hh.. ...g.aaaa....... </code></pre>
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    1. POHow to save contents of large .txt file in a HashMap but only display one line (randomly)
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    1. USPeter Lawrey
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      1. VTUpMod
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    1. COThank you, Peter! This is a nice alternative to using the .txt file. Mind you, it's a lot more lines of code but it adds reduces the chance of repetition.
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      1. USUserBruiser
 

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