chapter13n1.java

JAVA源代码程序aashjkjhkjhkjhjkhkj

// print

/**
 * models three different types of flight reservation
 */

import java.io.* ;
import java.lancs.* ;
import java.util.* ;

class Reservation
    {
    private int flightNumber ;
    private Date dateOfTravel ;
    private int seatNumber ;

    public void set(int fn, int sn)
	{
	flightNumber = fn ;
	seatNumber = sn ;
	} // end of method set

    public void read() throws IOException
	{
	BasicIo.prompt("Flight number?: ") ;
	flightNumber = BasicIo.readInteger() ;
	BasicIo.prompt("Seat number?: ") ;
	seatNumber = BasicIo.readInteger() ;
	} // end of method read

    public void print()
	{
	System.out.println("Flight Number: " + flightNumber) ;
	System.out.println("Seat Number: " + seatNumber) ;
	} // end of method print

    public String toString()
	{
	return "flight " + flightNumber + ": seat " + seatNumber ;
	} // end of method toString
    } // end of class Reservation

class BasicReservation extends Reservation
    {
    } // end of class BasicReservation

class NiceReservation extends Reservation
    {
    public static final int AISLE = 1, WINDOW = 2 ;
    public static final int GREEN = 1, WHITE = 2, RED = 3 ;

    private int seatSort ;
    private int food ;

    public void set(int fn, int sn, int st, int f)
	{
	super.set(fn, sn) ;
	seatSort = st ;
	food = f ;
	} // end of method set

    public void read() throws IOException
	{
	super.read() ;		// call read method belonging to
				// superclass - in this case
				// Reservation.read
	BasicIo.prompt("kind of food? 1 (green), 2 (white), 3 (red): ") ;
	food = BasicIo.readInteger() ;
	BasicIo.prompt("kind of seat? 1 (aisle), 2 (window): ") ;
	seatSort = BasicIo.readInteger() ;
	} // end of method read

    public void print()
	{
	super.print() ;
	System.out.println("Type of Seat: " + seatSort) ;
	System.out.println("Type of Food: " + food) ;
	} // end of method print

    public String toString()
	{
	return super.toString() + ": sort " + seatSort + ": food " + food ;
	} // end of method toString
    } // end of class NiceReservation

class PoshReservation extends NiceReservation
    {
    private String destination ;

    public void set(int fn, int sn, int st, int f, String d)
	{
	super.set(fn, sn, st, f) ;
	destination = d ;
	} // end of method set

    public void read() throws IOException
	{
	super.read() ;		// call read method belonging to
				// superclass - in this case
				// NiceReservation.read
	BasicIo.prompt("Destination address?: ") ;
	destination = BasicIo.readString() ;
	} // end of method read

    public void print()
	{
	super.print() ;
	System.out.println("Destination address: " + destination) ;
	} // end of method print

    public String toString()
	{
	return super.toString() + ": destination " + destination ;
	} // end of method toString
    } // end of class PoshReservation
    
public class Chapter13n1
    {
    public static void main(String[] args) throws IOException
	{
	System.out.println("res1: Basic") ;
	BasicReservation res1 = new BasicReservation() ;
	res1.read() ;
	System.out.println("Basic Reservation is " + res1) ;
	System.out.println() ;

	System.out.println("res2: Nice") ;
	NiceReservation res2 = new NiceReservation() ;
	res2.read() ;
	System.out.println("Nice Reservation is " + res2) ;
	System.out.println() ;

	System.out.println("res3: Posh") ;
	PoshReservation res3 = new PoshReservation() ;
	res3.read() ;
	System.out.println("Posh Reservation is " + res3) ;
	} // end of main method
    } // end of class Chapter13n1