calculatorimpl.java

分布式计算——RMI远程方法调用：学习RMI编程

//Implementation
//编写远程服务的具体实现

import java.rmi.server.UnicastRemoteObject; 
public class CalculatorImpl extends UnicastRemoteObject implements Calculator 
{ 
    // 这个实现必须有一个显式的构造函数，并且要抛出一个RemoteException异常 
    public CalculatorImpl() 
        throws java.rmi.RemoteException
    { 
        super(); 
    }  
   
    public long add(long a, long b) 
        throws java.rmi.RemoteException
    { 
        return a + b; 
    }
      
    public long sub(long a, long b) 
        throws java.rmi.RemoteException 
    { 
        return a - b; 
    } 
    
    public long mul(long a, long b) 
        throws java.rmi.RemoteException
    { 
        return a * b; 
    } 
 
    public long div(long a, long b) 
        throws java.rmi.RemoteException
    { 
        return a / b; 
    } 
}