On Mar 26, 2008, at 7:15 AM, João Aguiam wrote: I haven't explain myself correctly. This method is in DatagramSoctekImpl class. This class is abstract and java.net doesn't provide a concretization. How can I solve this? How about DatagramSocketImplFactory.createDatagramSocketImpl()? You seem to be asking a general Java question, not a GNU Classpath question. Trevor |