根据自己的理解写的，还不完善，错误的地方还请不吝赐教，谢谢！
cars父类：
public abstract class Car {
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public double getGoods() {
return goods;
}
public void setGoods(double goods) {
this.goods = goods;
}
public int getPeople() {
return people;
}
public void setPeople(int people) {
this.people = people;
}
public double price;
public String title;
public int people;
public double goods;
@Override
public String toString() {
return title + " \t " + price + "/天\t 载人:" + people + "/人";
}
}货车，客车，皮卡车子类：
public class Trunck extends Car {
/**
* Override construct function.
*/
public Trunck(String title, double price, int goods){
this.price = price;
this.title = title;
this.goods = goods;
}
/**
* Override toString function.
*/
@Override
public String toString() {
return title + "\t " + price + "/天\t 载货:" + goods + "吨";
}
}public class Bus extends Car{
/**
* Override construct function.
*/
public Bus(String title, double price, int people){
this.price = price;
this.title = title;
this.people = people;
}
}public class Pickup extends Car{
/**
* Override construct function.
*/
public Pickup(String title, double price, int people, double goods){
this.price = price;
this.title = title;
this.people = people;
this.goods = goods;
}
/**
* Override toString function.
*/
@Override
public String toString() {
return title + "\t " + price + "/天\t 载人:" + people + "/人\t 载货:" + goods + "吨";
}
}用户选项类：
public class SelectInformation {
public double getDays() {
return days;
}
public void setDays(double days) {
this.days = days;
}
public double getSumPrice() {
return sumPrice;
}
public void setSumPrice(double sumPrice) {
this.sumPrice += sumPrice;
}
public int getSumPeople() {
return sumPeople;
}
public void setSumPeople(int sumPeople) {
this.sumPeople += sumPeople;
}
public double getSumTrunk() {
return sumTrunk;
}
public void setSumTrunk(double sumTrunk) {
this.sumTrunk += sumTrunk;
}
public double getTotalPrice() {
return totalPrice;
}
public void setTotalPrice(double days, double price) {
this.totalPrice = days * price;
}
public int getCarRental() {
return carRental;
}
public void setCarRental(int carRental) {
this.carRental = carRental;
}
public ArrayList<String> getPcarsList() {
return pcarsList;
}
public void setPcarsList(ArrayList<String> pcarsList) {
this.pcarsList = pcarsList;
}
public ArrayList<String> getTcarsList() {
return tcarsList;
}
public void setTcarsList(ArrayList<String> tcarsList) {
this.tcarsList = tcarsList;
}
public double days;
public int carRental;
public double sumPrice;
public int sumPeople;
public double sumTrunk;
public double totalPrice;
public ArrayList<String> pcarsList;
public ArrayList<String> tcarsList;
}main测试类：
public class Main {
/**
* Print car rental information.
*/
public static void printInfo(Car[] cars) {
System.out.println("您可租车的类型及其价目表:");
System.out.println("序号 汽车名称 租金 容量");
for (int i = 0; i < cars.length; i++) {
System.out.println(i + 1 + ". " + cars[i].toString());
}
}
/**
* Get user input information.
*/
public static void scanInput(Car[] cars, int num, Scanner input, SelectInformation selInfo) {
System.out.println("请输入您要租用的汽车数量:");
num = input.nextInt();
if (num < 1 || num > cars.length) {
System.out.println("对不起,您输入的数量有误,请重新输入:");
System.out.println("请输入您要租用的汽车数量:");
num = input.nextInt();
}
selInfo.setCarRental(num);
if (0 < selInfo.getCarRental() && selInfo.getCarRental() <= cars.length) {
ArrayList<String> tmpPlist = new ArrayList<>();
ArrayList<String> tmpTlist = new ArrayList<>();
for (int i = 0; i < selInfo.getCarRental(); i++) {
System.out.println("请输入" + (i + 1) + "车辆的序号:");
num = input.nextInt();
if (cars[num - 1].getPeople() != 0) {
tmpPlist.add(cars[num - 1].getTitle());
selInfo.setSumPeople(cars[num - 1].people);
}
if ((cars[num - 1].getPeople() != 0 && cars[num - 1].getGoods() != 0.0) || cars[num - 1].getGoods() != 0.0) {
tmpTlist.add(cars[num - 1].getTitle());
selInfo.setSumTrunk(cars[num - 1].goods);
}
selInfo.setSumPrice(cars[num - 1].getPrice());
}
selInfo.setPcarsList(tmpPlist);
selInfo.setTcarsList(tmpTlist);
}
System.out.println("请输入租车天数:");
num = input.nextInt();
selInfo.setDays(num);
selInfo.setTotalPrice(num, selInfo.sumPrice);
}
/**
* Print user billlist.
*/
public static void billList(SelectInformation selInfo) {
System.out.println("您的账单:");
System.out.println("****可载人的车有:");
for(int i=0; i < selInfo.getPcarsList().size(); i++){
System.out.print(selInfo.getPcarsList().get(i) + "\t");
}
System.out.println("\t共载人:" + selInfo.getSumPeople() + "人");
System.out.println("****载货的车有:");
for(int i=0; i < selInfo.getTcarsList().size(); i++){
System.out.print(selInfo.getTcarsList().get(i) + "\t");
}
System.out.println("\t共载货:" + selInfo.getSumTrunk() + "吨");
System.out.print("****租车总天数:" + selInfo.getDays() + "天");
System.out.println("****租车总价格:" + selInfo.getTotalPrice() + "元");
}
public static void main(String[] args){
Car cars[] = {new Bus("奥迪A4", 500, 4),new Bus("马自达6", 400, 4), new Pickup("皮卡雪6", 450,4,2),
new Bus("金龙", 800,20), new Trunck("松花江", 400, 4), new Trunck("依维柯", 1000, 20)};
Scanner input = new Scanner(System.in);
System.out.println("欢迎使用哒哒租车系统:");
System.out.println("您是否要租车:1是 0否");
try {
Integer num = input.nextInt();
SelectInformation selInfo = new SelectInformation();
if (num == 1) {
printInfo(cars);
scanInput(cars, num, input, selInfo);
billList(selInfo);
}
}catch (Exception e) {
System.out.println("输入错误,系统不识别!");
}
System.out.println("谢谢光临,下次再来!");
return;
}
}