1 /*
2 * $Id: UnpredictableRandomGenerator.java,v 1.1 2005/09/26 18:23:20 weiju Exp $
3 *
4 * Created on 2005/09/23
5 * Copyright 2005 by Wei-ju Wu
6 *
7 * This file is part of The Z-machine Preservation Project (ZMPP).
8 *
9 * ZMPP is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * ZMPP is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ZMPP; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23 package org.zmpp.vmutil;
24
25 import java.util.Random;
26
27 /***
28 * This class implements the "random" random number generator mentioned
29 * in the Z-machine standard document.
30 *
31 * @author Wei-ju Wu
32 * @version 1.0
33 */
34 public class UnpredictableRandomGenerator implements RandomGenerator {
35
36 /***
37 * The random generator.
38 */
39 private Random rand;
40
41 /***
42 * Constructor.
43 */
44 public UnpredictableRandomGenerator() {
45
46 rand = new Random(System.currentTimeMillis());
47 }
48
49 /***
50 * {@inheritDoc}
51 */
52 public int next() {
53
54 return rand.nextInt(MAX_VALUE - 1) + 1;
55 }
56 }