RMI非常经典的实例+PPT说明(step by step)

				//Calculator.java 
				//define the interface 
				import java.rmi.Remote; 
				
				public interface Calculator extends Remote 
				{ 
				    public long add(long a, long b)  
				        throws java.rmi.RemoteException;  
				
				    public long sub(long a, long b)  
				        throws java.rmi.RemoteException;  
				
				    public long mul(long a, long b)  
				        throws java.rmi.RemoteException;  
				
				    public long div(long a, long b)  
				        throws java.rmi.RemoteException;  
				}