factorialimpl.java

书籍《JAVA面向对象程序设计》书籍的课后源代码。相信对很多人都有帮助

///////    FactorialImpl.java    ///////
package myrmi.demo;

import java.rmi.*;
import java.rmi.activation.*;

public class FactorialImpl extends Activatable
    implements Factorial
{ 
    public FactorialImpl(ActivationID id, MarshalledObject data)
                   throws RemoteException
    {
        super(id, 0);
    }

    public int factorial(int n)
            throws RemoteException
    {
        if ( n < 0 )
            throw( new RemoteException(
                     "Arg to factorial cannot be negative."));
        return ( n == 0 ) ? 1
               : n*factorial(n-1);
    }
}