<p>I have a webservice, which takes java.lang.object objects as parameters (because at runtime only know hte type of object)...after doing process, reply response setting java.lang.Object to it.</p>

<p>I am able to send the reuest objects to webservice from calling program, but getting NotSerializable exception while building the response from webservice.</p>

<p>I came to know that 'if we implement, java.io.serializable, the mebmers also should be serializable objects'... here Object isnot a serializable object..it doesn't impllement Serializable....</p>

<p>If anyone could guide mw with right solution..I wouold be thankful.</p>

<p>Thanks
Bhaskar</p>

If the members of the class don't implement Serializable then you can't use native Java serialisation for it.  That's basically what your error message is telling you.
If you cannot cause the underlying objects to implement Serializable, then you are probably going to have to find a different method of serialisation for passing in and out of your web service.  Popular varieties from Java are XML, JSON, AMF, although you can always roll your own.
If you have Java objects on either end of your request then make sure you factor your code so that your serialisation and de-serialisation code is in a library that can be used at both ends.  That will greatly ease the burden of testing in your implementation.
I would recommend keeping all the serialisation code out of the domain objects themselves.  Think about using a factory pattern for creation of your objects.
HTH