flightfactoryimpl.java

这个代码是利用中间件RMI开发的flight航班查询

package flight;
import java.rmi.*;
import java.rmi.server.*;
import java.util.*;
public class FlightFactoryImpl extends UnicastRemoteObject implements Flightfactory{
	protected Hashtable<String,Flight>flights;
	public FlightFactoryImpl()throws RemoteException{
		flights=new Hashtable<String,Flight>();
		
	}
	public Flight getFlight(String flightNumber)throws RemoteException{
		Flight flight=flights.get(flightNumber);
		if(flight!=null)return flight;
		flight=new FlightImpl(flightNumber,null,null,null,null);
		flights.put(flightNumber, flight);
		return flight;
	}
	
}