package apibook.c8.s1;import java.rmi.*;import java.rmi.server.UnicastRemoteObject;public class RemImpl extends UnicastRemoteObject implements Rem{ public RemImpl() throws RemoteException {}//構造函數拋出RemoteException異常 public String getMessage() throws RemoteException { return("Here is a remote message.");  }} //向RMI客戶返回一個消息串