Source code: com/virtuosotechnologies/asaph/launch/SafeLaunch.java
1 /*
2 ================================================================================
3
4 FILE: SafeLaunch.java
5
6 PROJECT:
7
8 Asaph
9
10 CONTENTS:
11
12 Safe launcher. Performs various checks before invoking launch.
13
14 PROGRAMMERS:
15
16 Daniel Azuma (DA) <dazuma@kagi.com>
17
18 COPYRIGHT:
19
20 Copyright (C) 2003 Daniel Azuma (dazuma@kagi.com)
21
22 This program is free software; you can redistribute it and/or
23 modify it under the terms of the GNU General Public License as
24 published by the Free Software Foundation; either version 2
25 of the License, or (at your option) any later version.
26
27 This program is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 GNU General Public License for more details.
31
32 You should have received a copy of the GNU General Public
33 License along with this program; if not, write to
34 Free Software Foundation, Inc.
35 59 Temple Place, Suite 330
36 Boston, MA 02111-1307 USA
37
38 ================================================================================
39 */
40
41
42 package com.virtuosotechnologies.asaph.launch;
43
44
45 import java.util.StringTokenizer;
46
47
48 /**
49 * Safe launcher. Performs various checks before invoking launch.
50 */
51 public class SafeLaunch
52 {
53 /**
54 * Main
55 */
56 public static void main(
57 String[] args)
58 {
59 try
60 {
61 String jreVersion = System.getProperty("java.specification.version");
62 StringTokenizer tok = new StringTokenizer(jreVersion, ".");
63 int majorVersion = Integer.parseInt(tok.nextToken());
64 int minorVersion = Integer.parseInt(tok.nextToken());
65 if (majorVersion < 1 ||
66 (majorVersion == 1 && minorVersion < 4))
67 {
68 System.out.println("Java version 1.4 or later is required.");
69 System.out.println("Your Java version is "+jreVersion);
70 System.exit(-1);
71 }
72 }
73 catch (Exception ex)
74 {
75 System.out.println("Exception while trying to get Java version:");
76 ex.printStackTrace();
77 System.exit(-1);
78 }
79
80 new Launch(args).launch();
81 }
82 }