How to call java service from other java service

i have written four java services. i want to call one java service to be called in my other java services. is it possible ???
if yes, how could i do it ???

Yes, u can calla java service from a java service using Service.doInvoke() method [doInvoke( name, IData input)], whose details can be found by refering to Java API supplied by webMethods.

Thanks to both of you guys…Sri Kalyana Ram G and Mark Carlson.

Its working fine.