Class.getResource (className) giving me a NullPointerException

I created a platform-independent library that I want to use in a J2SE and Android project. Inside this library, I have a class Versionthat loads the details of its version from the manifest. On PC it works well, on Android I get NullPointerException, and I can’t understand why.

This is my class:

public class Version {

    private static int APPCODE = 12354;
    private static int MAJOR;
    private static int MINOR;
    private static char RELEASE;
    private static int BUILD;
    private static int PROTOCOL;

    static {
        try {
            Class clazz = Version.class;
            String className = clazz.getSimpleName() + ".class";
            String classPath = clazz.getResource(className).toString(); //NullPointerException
            if (classPath.startsWith("jar")) {
                String manifestPath = classPath.substring(0,
                        classPath.lastIndexOf("!") + 1) + "/META-INF/MANIFEST.MF";
                Manifest manifest = new Manifest(new URL(manifestPath).openStream());
                Attributes attr = manifest.getMainAttributes();
                //APPCODE = Integer.parseInt(attr.getValue("APPCODE"));
                MAJOR = Integer.parseInt(attr.getValue("MAJOR"));
                MINOR = Integer.parseInt(attr.getValue("MINOR"));
                RELEASE = attr.getValue("RELEASE").charAt(0);
                BUILD = Integer.parseInt(attr.getValue("BUILD"));
                PROTOCOL = Integer.parseInt(attr.getValue("PROTOCOL"));
            } else {
                System.err.println("Couldn't find manifest, reverting to test mode");
                MAJOR = 0;
                MINOR = 0;
                RELEASE = 'n';
                BUILD = 0;
                //APPCODE = 12354;
            }
        } catch (IOException e) {
            System.err.println("Failed to load manifest file. " + e);
            MAJOR = 0;
            MINOR = 0;
            RELEASE = '0';
            BUILD = 0;
            //APPCODE = 12354;
            PROTOCOL = 0;
        } catch (NumberFormatException e) {
            System.err.println("Failed to load manifest file. " + e);
            MAJOR = 0;
            MINOR = 0;
            RELEASE = '0';
            BUILD = 0;
            //APPCODE = 12354;
            PROTOCOL = 0;
        }
    }

    public static int getProtocol() {
        return PROTOCOL;
    }

    public static int getAppCode() {
        return APPCODE;
    }

    public static int getBuildNumber() {
        return BUILD;
    }

    public static int getMajor() {
        return MAJOR;
    }

    public static int getMinor() {
        return MINOR;
    }

    public static char getRelease() {
        return RELEASE;
    }
}

(Sorry, the lines System.err.println()that are intended for debugging on a PC).

Why does this work fine on a PC, but not on Android?

Full stack trace:

03-12 22:13:11.687: E/AndroidRuntime(11780): FATAL EXCEPTION: main
03-12 22:13:11.687: E/AndroidRuntime(11780): java.lang.ExceptionInInitializerError
03-12 22:13:11.687: E/AndroidRuntime(11780):    at com.logandam.wififileshare.android.MainActivity.onCreate(MainActivity.java:24)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.app.Activity.performCreate(Activity.java:4465)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1932)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1993)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1159)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.os.Handler.dispatchMessage(Handler.java:99)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.os.Looper.loop(Looper.java:137)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at android.app.ActivityThread.main(ActivityThread.java:4507)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at java.lang.reflect.Method.invokeNative(Native Method)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at java.lang.reflect.Method.invoke(Method.java:511)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
03-12 22:13:11.687: E/AndroidRuntime(11780):    at dalvik.system.NativeStart.main(Native Method)
03-12 22:13:11.687: E/AndroidRuntime(11780): Caused by: java.lang.NullPointerException
03-12 22:13:11.687: E/AndroidRuntime(11780):    at com.logandam.wififileshare.net.Version.<clinit>(Version.java:30)
03-12 22:13:11.687: E/AndroidRuntime(11780):    ... 15 more

Update: className= Version.classon PC and Android. Use getName()instead getSimpleName()is interrupted on the PC and still does not work on Android.