java类库详细讲解

				
				
				
				Defining and Exporting a Remote Object
				(Java Developers Almanac Example)
				
				
				
				
				
				
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				The Java Developers Almanac 1.4
				
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				    java.rmi
				         [6 examples]
				        
				
				  
				    e188.  
				    Defining and Exporting a Remote Object
				
				1. Define the remote interface. 
				
				
				    import java.rmi.*;
				    
				    public interface RObject extends Remote {
				        void aMethod() throws RemoteException;
				    }
				
				2. Define the remote object implementation.
				
				
				    import java.rmi.*;
				    import java.rmi.server.UnicastRemoteObject;
				    
				    public class RObjectImpl extends UnicastRemoteObject implements RObject {
				        public RObjectImpl() throws RemoteException {
				            super();
				        }
				        // All remote methods must throw RemoteException
				        public void aMethod() throws RemoteException {
				        }
				    }
				
				3. Compile the remote object implementation.
				
				
				    > javac RObject.java RObjectImpl.java
				
				4. Generate the skeletons and stubs.
				
				
				    > rmic RObjectImpl
				
				
				5. Create an instance of the remote object and bind it to the RMI registry.
				
				
				    try {
				        RObject robj = new RObjectImpl();
				        Naming.rebind("//localhost/RObjectServer", robj);
				    } catch (MalformedURLException e) {
				    } catch (UnknownHostException e) {
				    } catch (RemoteException e) {
				    }
				
				
				
				
				             Related Examples
				        
				
				
				
				
				e187. 
				    Starting the RMI Registry
				
				
				
				e189. 
				    Looking Up a Remote Object and Invoking a Method
				
				
				
				e190. 
				    Passing Parameters to a Remote Method
				
				
				
				e191. 
				    Returning Values from a Remote Method
				
				
				
				e192. 
				    Throwing an Exception from a Remote Method
				
				
				
				
				
				
				
				
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