Static Member Variables in Singleton Class !!! But why ?

I have a singleton class, which has some static member variables

like:-

private static byte[] someArray;

private static CallbackIF objectOfCallbackIF;

static final String SYSTEM_DATE_METHOD_DECODE_TIME="decodeTime";

etc.

My query is If I have a Singleton class, it will have only One Object..

Then why do I need to have Class-level variables...Why can't

I have normal variables....Why should I have static variables..

[474 byte] By [Need2LearnJavaa] at [2007-10-1 20:08:37]