getDeclaredFields() not returning full list on IBM JAVA SE5?

[jaywak]

Just tried running some code on Linux (2.4.21-32.0.1.EL and Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_04-b05)) and Windows XPSP2 (with Java HotSpot(TM) Client VM (build 1.5.0_11-b03, mixed mode, sharing)) and in both cases, get the following list returned from calling getDeclaredFields() on java.lang.ClassLoader via this code snippet:

Field[] fields = loaderClass.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
System.out.println("fieldName = " + fieldName);
}

fieldName = private boolean java.lang.ClassLoader.initialized
fieldName = private java.lang.ClassLoader java.lang.ClassLoader.parent
fieldName = private java.util.Hashtable java.lang.ClassLoader.package2certs
fieldName = java.security.cert.Certificate[] java.lang.ClassLoader.nocerts
fieldName = private java.util.Vector java.lang.ClassLoader.classes
fieldName = private java.util.Set java.lang.ClassLoader.domains
fieldName = private java.util.HashMap java.lang.ClassLoader.packages
fieldName = private static sun.misc.URLClassPath java.lang.ClassLoader.bootstrapClassPath
fieldName = private static java.lang.ClassLoader java.lang.ClassLoader.scl
fieldName = private static boolean java.lang.ClassLoader.sclSet
fieldName = private java.security.ProtectionDomain java.lang.ClassLoader.defaultDomain
fieldName = private static java.util.Vector java.lang.ClassLoader.loadedLibraryNames
fieldName = private static java.util.Vector java.lang.ClassLoader.systemNativeLibraries
fieldName = private java.util.Vector java.lang.ClassLoader.nativeLibraries
fieldName = private static java.util.Stack java.lang.ClassLoader.nativeLibraryContext
fieldName = private static java.lang.String[] java.lang.ClassLoader.usr_paths
fieldName = private static java.lang.String[] java.lang.ClassLoader.sys_paths
fieldName = private boolean java.lang.ClassLoader.defaultAssertionStatus
fieldName = private java.util.Map java.lang.ClassLoader.packageAssertionStatus
fieldName = java.util.Map java.lang.ClassLoader.classAssertionStatus
fieldName = private boolean java.lang.ClassLoader.initialized
fieldName = private java.lang.ClassLoader java.lang.ClassLoader.parent
fieldName = private java.util.Hashtable java.lang.ClassLoader.package2certs
fieldName = java.security.cert.Certificate[] java.lang.ClassLoader.nocerts
fieldName = private java.util.Vector java.lang.ClassLoader.classes
fieldName = private java.util.Set java.lang.ClassLoader.domains
fieldName = private java.util.HashMap java.lang.ClassLoader.packages
fieldName = private static sun.misc.URLClassPath java.lang.ClassLoader.bootstrapClassPath
fieldName = private static java.lang.ClassLoader java.lang.ClassLoader.scl
fieldName = private static boolean java.lang.ClassLoader.sclSet
fieldName = private java.security.ProtectionDomain java.lang.ClassLoader.defaultDomain
fieldName = private static java.util.Vector java.lang.ClassLoader.loadedLibraryNames
fieldName = private static java.util.Vector java.lang.ClassLoader.systemNativeLibraries
fieldName = private java.util.Vector java.lang.ClassLoader.nativeLibraries
fieldName = private static java.util.Stack java.lang.ClassLoader.nativeLibraryContext
fieldName = private static java.lang.String[] java.lang.ClassLoader.usr_paths
fieldName = private static java.lang.String[] java.lang.ClassLoader.sys_paths
fieldName = private boolean java.lang.ClassLoader.defaultAssertionStatus
fieldName = private java.util.Map java.lang.ClassLoader.packageAssertionStatus
fieldName = java.util.Map java.lang.ClassLoader.classAssertionStatus

When I run the same code on AIX 5.2 with IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 AIX ppc64-64
I get:
FieldName string = static java.lang.ClassLoader java.lang.ClassLoader.systemClassLoader
FieldName string = private static java.lang.ClassLoader java.lang.ClassLoader.applicationClassLoader
FieldName string = private static boolean java.lang.ClassLoader.initSystemClassLoader
FieldName string = private long java.lang.ClassLoader.vmRef
FieldName string = java.lang.ClassLoader java.lang.ClassLoader.parent
FieldName string = private java.lang.Object java.lang.ClassLoader.assertionLock
FieldName string = private boolean java.lang.ClassLoader.defaultAssertionStatus
FieldName string = private java.util.Map java.lang.ClassLoader.packageAssertionStatus
FieldName string = private java.util.Map java.lang.ClassLoader.classAssertionStatus
FieldName string = private java.util.Hashtable java.lang.ClassLoader.genericRepository
FieldName string = private java.util.Hashtable java.lang.ClassLoader.annotationCache
FieldName string = private java.util.Hashtable java.lang.ClassLoader.packages
FieldName string = private java.lang.Object java.lang.ClassLoader.lazyInitLock
FieldName string = private java.util.Hashtable java.lang.ClassLoader.classSigners
FieldName string = private java.util.Hashtable java.lang.ClassLoader.packageSigners
FieldName string = private static java.security.cert.Certificate[] java.lang.ClassLoader.emptyCertificates
FieldName string = private java.security.ProtectionDomain java.lang.ClassLoader.defaultProtectionDomain
FieldName string = private java.util.Hashtable java.lang.ClassLoader.contexts

I'm actually searching for nativeLibraries and SystemNativeLibraries, which is present in the first instance and not the second. Is the IBM Java version organised differently?

Thanks
JW