FULL PRODUCT VERSION :
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
When calling the getSpecificationVersion() on the "java.lang." package (e.g. Object.class.getPackage().getSpecificationVersion()) the string "1.4" is returned instead of the expected value "1.5".

Accesing the java.specification.version system property reveals the expected value "1.5".

Looking at the MANIFEST.MF in rt.jar, it can be seen, that obviously the runtime librariy identifies itself as being 1.4 specification compliant, which is not exactly what seems expected.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
compile and run the sample program.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
System properties:
  java.specification.version: 1.5

java.lang Package attributes
  specificationVersion: 1.5

ACTUAL -
System properties:
  java.specification.version: 1.5

java.lang Package attributes
  specificationVersion: 1.4


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class TestVersion {

    private static void printSystemProperty(String prop) {
        System.out.println(" " + prop + ": " + System.getProperty(prop));
    }

    public static void main(String[] args) {

        System.out.println("System properties:");
        printSystemProperty("java.specification.version");

        System.out.println();
        System.out.println("java.lang Package attributes");
        Package pack = Object.class.getPackage();
        System.out.println(" specificationVersion: " + pack.getSpecificationVersion());

    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use the system properties instead of the "java.lang" package properties.

Release Regression From : 5.0
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.