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| 6. 61. 5. Determine the JDK Version Number |
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/** Determine the JDK Version Number
*
* There is a human readible JDK version number available as a Java property. The property name is called "java.version".
* Unfortunately it is complicated to parse it mechanically. A somewhat better choice is the Java property called
* "java.class.version". The property value can be converted to a floating pointer value. JDK 1.1 implies 45.3. JDK 1.2
* implies 46.0. JDK 1.3 implies 47.0. JDK 1.4 implies 48.0.
*
* java.class.version property value
* <ul>
* <li> JDK 1.1 = 45.3
* <li> JDK 1.2 = 46.0
* <li> JDK 1.3 = 47.0
* <li> JDK 1.4 = 48.0
* </ul>
*
* @author Thomas Rischbeck <thomas.rischbeck@arjuna.com>
* @version $Id: VersionCheck.java 2342 2006-03-30 13:06:17Z $
*/
public class VersionCheck {
private static final String CLASS_VERSION = System.getProperty("java.class.version","44.0");
private static final boolean IS_JDK_11 = ("46.0".compareTo(CLASS_VERSION) > 0) && ("45.3".compareTo(CLASS_VERSION) <= 0);
private static final boolean IS_JDK_12 = ("47.0".compareTo(CLASS_VERSION) > 0) && ("46.0".compareTo(CLASS_VERSION) <= 0);
private static final boolean IS_JDK_13 = ("48.0".compareTo(CLASS_VERSION) > 0) && ("47.0".compareTo(CLASS_VERSION) <= 0);
private static final boolean IS_JDK_14 = ("49.0".compareTo(CLASS_VERSION) > 0) && ("48.0".compareTo(CLASS_VERSION) <= 0);
private static final boolean IS_JDK_13_OR_BELOW = IS_JDK_11 || IS_JDK_12 || IS_JDK_13;
private static final boolean IS_JDK_14_OR_ABOVE = ("48.0".compareTo(CLASS_VERSION) <= 0);
public static final boolean isJDK11only()
{
return IS_JDK_11;
}
public static final boolean isJDK12only()
{
return IS_JDK_12;
}
public static final boolean isJDK13only()
{
return IS_JDK_13;
}
public static final boolean isJDK14only()
{
return IS_JDK_14;
}
public static final boolean isJDK13orBelow()
{
return IS_JDK_13_OR_BELOW;
}
public static final boolean isJDK14orAbove()
{
return IS_JDK_14_OR_ABOVE;
}
}
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