COBRA defined by OMG provides an independent and standard distributed environment regardless of underlying operating systems or programming languages. OMG COS (Common Object Service) specification defines a set of event services to support asynchronous communication between distributed CORBA objects. The COS specification leaves open a variety of event service implementation and optimization options. The event service consists of three objects, namely supplier, consumer and event channel in which proxy object exists. This paper addresses an implementation of the event service with Java. In our implementation, the proxy objects in the event channel are organized as a mesh structure and N:N event communication is also supported.