org.jboss.util.platform: public final class: Java

org.jboss.util.platform
public final class: Java [javadoc | source]

java.lang.Object
   org.jboss.util.platform.Java

Provides common access to specifics about the version of Java that a virtual machine supports.

Determines the version of the Java Virtual Machine by checking for the availablity of version specific classes.

Classes are loaded in the following order:

java.lang.StackTraceElement was introduced in JDK 1.4
java.lang.StrictMath was introduced in JDK 1.3
java.lang.ThreadLocal was introduced in JDK 1.2
java.lang.Void was introduced in JDK 1.1

version: < - tt>$Revision: 1.3 $

author: < - a href="mailto:jason@planet57.com">Jason Dillon

Field Summary
public static final int	VERSION_1_0	Java version 1.0 token
public static final int	VERSION_1_1	Java version 1.1 token
public static final int	VERSION_1_2	Java version 1.2 token
public static final int	VERSION_1_3	Java version 1.3 token
public static final int	VERSION_1_4	Java version 1.4 token

Method from org.jboss.util.platform.Java Summary:
getVersion, isCompatible, isVersion

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.jboss.util.platform.Java Detail:
public static int getVersion() { // default to 1.0 int version = VERSION_1_0; try { // check for 1.1 Class.forName("java.lang.Void"); version = VERSION_1_1; // check for 1.2 Class.forName("java.lang.ThreadLocal"); version = VERSION_1_2; // check for 1.3 Class.forName("java.lang.StrictMath"); version = VERSION_1_3; // check for 1.4 Class.forName("java.lang.StackTraceElement"); version = VERSION_1_4; } catch (ClassNotFoundException e) { ThrowableHandler.add(e); } VERSION = version; return VERSION; } Return the version of Java supported by the VM.
public static boolean isCompatible(int version) { // if our vm is the same or newer then we are compatible return VERSION >= version; } Retrurns true if the current virtual machine is compatible with the given version identifer.
public static boolean isVersion(int version) { return VERSION == version; } Retrurns true if the given version identifer is equal to the version identifier of the current virtuial machine.

Method from org.jboss.util.platform.Java Detail:

 public static int getVersion() {
       
      // default to 1.0
      int version = VERSION_1_0;
      try {
         // check for 1.1
         Class.forName("java.lang.Void");
         version = VERSION_1_1;
         // check for 1.2
         Class.forName("java.lang.ThreadLocal");
         version = VERSION_1_2;
         // check for 1.3
         Class.forName("java.lang.StrictMath");
         version = VERSION_1_3;
         // check for 1.4
         Class.forName("java.lang.StackTraceElement");
         version = VERSION_1_4;
      }
      catch (ClassNotFoundException e) {
         ThrowableHandler.add(e);
      }
      VERSION = version;
      return VERSION;
}

Java

 public static boolean isCompatible(int version) {
      // if our vm is the same or newer then we are compatible
      return VERSION  >= version;
}

Retrurns true if the current virtual machine is compatible with the given version identifer.

 public static boolean isVersion(int version) {
      return VERSION == version;
}

Retrurns true if the given version identifer is equal to the version identifier of the current virtuial machine.