實現(xiàn)過程如下：

構(gòu)造抽象Auto類：是所有載客類型車的父類，如PassengerAuto類繼承了該類

構(gòu)造抽象類LoadWeight類：是所有既載客又載貨車型的父類，如Truck類繼承了該類

構(gòu)造儲存添加車型的CarList類：儲存系統(tǒng)管理員添加車型的類

構(gòu)造用戶租車購物車Cart類：儲存用戶租用了哪種車型及費用明細(xì)列表

客戶端類index類：調(diào)用以上各類實現(xiàn)租車系統(tǒng)

Auto.java:

package com.immoc.lib;

//僅能載客的車

public abstract class Auto {

private int id;//定義車的編號

private String carName;//定義車名

private int price;//定義車價

private int passengers;//定義載客量

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getCarName() {

return carName;

}

public void setCarName(String carName) {

this.carName = carName;

}

public int getPrice() {

return price;

}

public void setPrice(int price) {

this.price = price;

}

public int getPassengers() {

return passengers;

}

public void setPassengers(int passengers) {

this.passengers = passengers;

}

public Auto(int id,String carName, int price,int passengers) {

super();

this.setId(id);

this.setCarName(carName);

this.setPassengers(passengers);

this.setPrice(price);

}

public String getMsg(){

return this.getId()+"\t"+this.getCarName()+"\t"+this.getPrice()+"\t"+this.getPassengers()+"\t"+"0";

}

public void print(){

System.out.println(getMsg());

}

}

LoadWeight.java:

package com.immoc.lib;

import com.immoc.lib.Auto;

//即能載客又能載貨的車

public abstract class LoadWeight extends Auto {

private int weight;//定義載貨量

public LoadWeight(int id,String carName, int price ,int passengers,int weight){

super(id, carName, price, passengers);

this.weight = weight;

}

public int getWeight() {

return weight;

}

public void setWeight(int weight) {

this.setWeight(weight);

}

public String getMsg(){

return this.getId()+"\t"+this.getCarName()+"\t"+this.getPrice()+"\t"+this.getPassengers()+"\t"+this.getWeight();

}

public void print(){

System.out.println(getMsg());

}

}

PassengerAuto.java

package com.immoc;

import com.immoc.lib.Auto;

//創(chuàng)建只能載客的子類車--繼承于只能載客的類(Auto)

public class PassengerAuto extends Auto {

public PassengerAuto(int id, String carName, int price ,int passengers){

super(id, carName,price,passengers);

}

}

Truck.java

package com.immoc;

import com.immoc.lib.LoadWeight;

//創(chuàng)建能載客又能載貨的類(Truck),繼承于LoadWeight類

public class Truck extends LoadWeight {

public Truck(int id ,String carName, int price ,int passengers,int weight){

super(id, carName, price, passengers, weight);

}

}

CarList.java:

package com.immoc.lib;

import java.util.ArrayList;

//儲存系統(tǒng)中存在的車型--系統(tǒng)管理員使用

public class CarList {

public static ArrayList carlist = new ArrayList() ;//儲存現(xiàn)有的汽車列表

/**

* 向汽車列表中添加不同類型的汽車

* @param car 汽車對象

*/

public static boolean addCar(Auto car){

return carlist.add(car);

}

//顯示系統(tǒng)中存在的車型信息

public static void showCars(){

System.out.println("型號\t"+"名稱\t"+"價格\t"+"載客量\t"+"載貨量\t");

for(int i=0;i

Auto auto = carlist.get(i);

auto.print();

}

}

/**

* 刪除某種車型信息

* @param id 車型編號

* @return

*/

public static boolean removeCar(int id){

Auto car =null;

boolean isRemove = false;

for(int i=0; i

car = carlist.get(i);

if(car.getId()==id)

{

isRemove = (carlist.remove(i)!=null)?true:false;

break;

}

}

return isRemove;

}

/**

* 找到某一種車型的車

* @param id

* @return

*/

public static Auto getCar(int id){

Auto car =null;

boolean isGet = false;

for(int i=0; i

car = carlist.get(i);

if(car.getId()==id)

{

car = carlist.get(i);

isGet = true;

break;

}

}

car = isGet?car:null;

return car;

}

}

Cart.java

package com.immoc.lib;

import java.util.ArrayList;

//租車購物車列表：用來儲存租車信息--用戶使用

public class Cart {

public static ArrayList cartlist = new ArrayList();//儲存租車信息

public static int total=0;//儲存租車總費用

//計算租車費用總數(shù)

public static int getTotal(){

for(CarNode car:cartlist){

int id = car.getId();

int sum = car.getSum();

Auto auto = CarList.getCar(id);

if(auto!=null){

total+=auto.getPrice()*sum;

}

}

return total;

}

//顯示購物車中的信息

public static void showOrders(){

System.out.println("======================================================");

System.out.println("型號\t"+"名稱\t"+"價格\t"+"載客量\t"+"載貨量\t"+"租車數(shù)目\t"+"總價");

String list ="";

int totalsum=0;

for(CarNode car:cartlist){

int id = car.getId();

int sum = car.getSum();

Auto auto = CarList.getCar(id);

list+= auto.getMsg()+"\t"+sum+"\t"+auto.getPrice()*sum+"\t\n";

totalsum+=auto.getPrice()*sum;

}

System.out.print(list);

System.out.println("======================================================");

System.out.println("租車總費用："+totalsum);

System.out.println("======================================================");

}

//租用的車型和數(shù)目

public static boolean addCar(int id, int sum){

int index = Cart.getCar(id);

if(index==-1){

//如果購物車中不存在則創(chuàng)建對象

CarNode car = new CarNode(id,sum);

return cartlist.add(car);

}else{

//如果存在則修改數(shù)量

CarNode car = cartlist.get(index);

car.setSum(car.getSum()+sum);

cartlist.set(index, car);

}

return true;

}

//刪除一種車型

public static boolean removeCar(int id){

CarNode car =null;

boolean isRemove = false;

for(int i=0; i

car = cartlist.get(i);

if(car.getId()==id)

{

isRemove = (cartlist.remove(i)!=null)?true:false;

break;

}

}

return isRemove;

}

//找到一種車型

public static int getCar(int id){

CarNode car =null;

for(int i=0; i

car = cartlist.get(i);

if(car.getId()==id)

return i;

}

return -1;

}

}

//儲存租車信息

class CarNode{

private int id;//車型編號

private int sum;//租車的數(shù)目

public CarNode(int id, int sum){

this.setId(id);

this.setSum(sum);

}

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public int getSum() {

return sum;

}

public void setSum(int sum) {

this.sum = sum;

}

}

index.java

package com.immoc;

import com.immoc.lib.Auto;

import com.immoc.lib.CarList;

import com.immoc.lib.Cart;

//主方法

public class Index {

public static void show(Object obj){

System.out.println(obj.toString());

}

public static void main(String[] args){

Auto car01 = new PassengerAuto(100,"奧迪A4",500,4);

Auto car02 = new PassengerAuto(110,"馬自達(dá)6 ",400,4);

Auto car03 = new Truck(120,"松花江",300,2,4);

Auto car04 = new Truck(130,"依維柯",200,2,20);

Auto car05 = new PassengerAuto(140,"東風(fēng)日產(chǎn) ",100,4);

Auto car06 = new PassengerAuto(150,"寶馬 ",1000,4);

//管理員添加車型

CarList.addCar(car01);

CarList.addCar(car02);

CarList.addCar(car03);

CarList.addCar(car04);

CarList.addCar(car05);

CarList.addCar(car06);

//CarList.removeCar(4);

show("顯示系統(tǒng)中所有的車型信息：");

CarList.showCars();

//用戶添加租車的車型和租車數(shù)目

Cart.addCar(100,2);

Cart.addCar(110,2);

Cart.addCar(120,2);

Cart.addCar(130,2);

Cart.addCar(150,1);

Cart.removeCar(150);//移除車型

//租車系統(tǒng)結(jié)賬并顯示租車具體信息

show("您的租用信息如下:");

Cart.showOrders();

}

}

運行結(jié)果：

總結(jié)

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