1 /*
2 * EL4J, the Extension Library for the J2EE, adds incremental enhancements to
3 * the spring framework, http://el4j.sf.net
4 * Copyright (C) 2006 by ELCA Informatique SA, Av. de la Harpe 22-24,
5 * 1000 Lausanne, Switzerland, http://www.elca.ch
6 *
7 * EL4J is published under the GNU Lesser General Public License (LGPL)
8 * Version 2.1. See http://www.gnu.org/licenses/
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * For alternative licensing, please contact info@elca.ch
16 */
17 package ch.elca.el4j.util.codingsupport;
18
19 /**
20 * JDK Version utilities
21 *
22 * @svnLink $Revision: 3884 $;$Date: 2009-08-04 15:48:31 +0200 (Di, 04. Aug 2009) $;$Author: swismer $;$URL: https://el4j.svn.sourceforge.net/svnroot/el4j/branches/el4j_3_1/el4j/framework/modules/core/src/main/java/ch/elca/el4j/util/codingsupport/Version.java $
23 *
24 * @author Philipp Oser (POS)
25 */
26 public class Version {
27
28 /**
29 * @return Are we running in JDK 1.5 or later?
30 */
31 public static boolean isJdk15OrNewer(){
32 return (System.getProperty("java.specification.version").equals("1.5") ||
33 isJdk16OrNewer());
34 }
35
36 /**
37 * @return Are we running in JDK 1.6 or later?
38 */
39 public static boolean isJdk16OrNewer(){
40 String versionString = System.getProperty("java.specification.version");
41
42 // are we using JDK Version 1.10 or newer?
43 boolean version110OrNewer =
44 versionString.startsWith("1.1")&&(!versionString.equals("1.1"));
45
46 // ensure we get an error with JDK 1.10 and later JDKs
47 assert !version110OrNewer : " JDK is 1.10 or newer, update Version class";
48
49 return (versionString.compareTo("1.6")>=0);
50 }
51
52 }