交个作业~
父类Car（属性name，price）
子类Trunk（独有属性：载货量）
子类Bus（独有属性：载客量）
子类Pickup（独有属性：载货量，载客量）
CarRentTest（测试类）
package CarRent;
public class Car {
private String carName;
private int carPrice;
public Car(String name, int price) {
carName = name;
carPrice = price;
}
public String getCarName() {
return carName;
}
public int getCarPrice() {
return carPrice;
}
public void setCarName(String carName) {
this.carName = carName;
}
public void setCarPrice(int carPrice) {
this.carPrice = carPrice;
}
}package CarRent;
/* 货车，只能载货 */
public class Truck extends Car {
private int boatload; // 载货量
public Truck(String name, int price, int boatload) {
super(name, price);
this.boatload = boatload;
}
public int getBoatload() {
return boatload;
}
public void setBoatload(int boatload) {
this.boatload = boatload;
}
}package CarRent;
/* 客车，只能载人 */
public class Bus extends Car {
private int busload; // 载客量
public Bus(String name, int price, int busload) {
super(name, price);
this.busload = busload;
}
public int getBusload() {
return busload;
}
public void setBusload(int busload) {
this.busload = busload;
}
}package CarRent;
/* 皮卡，既可以载货也可以载人 */
public class Pickup extends Car {
private int boatload; // 载货量
private int busload; // 载客量
public Pickup(String name, int price, int boatload, int busload) {
super(name, price);
this.boatload = boatload;
this.busload = busload;
}
public int getBoatload() {
return boatload;
}
public int getBusload() {
return busload;
}
public void setBoatload(int boatload) {
this.boatload = boatload;
}
public void setBusload(int busload) {
this.busload = busload;
}
}package CarRent;
import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;
public class CarRentTest {
public static void main(String[] args) {
Car availableCars[] = new Car[] {
new Bus("奥迪A4", 500, 4),
new Bus("马自达6", 400, 4),
new Pickup("皮卡雪6", 450, 2, 4),
new Bus("金龙", 800, 20),
new Truck("松花江", 400, 4),
new Truck("依维柯", 1000, 20)
};
Scanner input = new Scanner(System.in);
System.out.println("欢迎使用答答租车系统：");
System.out.print("您是否要租车：1 是；0 否 >>> ");
int rentOrNot = input.nextInt();
while (rentOrNot != 0 && rentOrNot != 1) {
System.out.print("无效输入。请重新输入：1 是；0 否 >>> ");
rentOrNot = input.nextInt();
if (rentOrNot == 0) {
System.out.println("再见！欢迎下次使用！");
System.exit(0);
} else if (rentOrNot == 1) {
break;
} else {
continue;
}
}
System.out.println("您可租车的类型及其价目表：");
System.out.println("序号\t汽车名称\t租金\t\t容量");
for (int i = 0; i < availableCars.length; i++) {
Car car = availableCars[i];
System.out.print((i+1)+".\t");
System.out.print(car.getCarName()+"\t\t");
System.out.print(car.getCarPrice()+"元/天\t");
if (availableCars[i] instanceof Truck) {
System.out.print("载货："+((Truck)car).getBoatload()+"吨\n");
} else if (availableCars[i] instanceof Bus) {
System.out.print("载人："+((Bus)car).getBusload()+"人\n");
} else if (availableCars[i] instanceof Pickup) {
System.out.print("载人："+((Pickup)car).getBusload()+"人 载货："+((Pickup)car).getBoatload()+"吨\n");
}
}
System.out.print("请输入您要租汽车的数量（0 ~ "+availableCars.length+"）：>>> ");
int rentNumber = input.nextInt();
while (rentNumber < 0 || rentNumber > availableCars.length) {
System.out.print("无效输入。请重新输入（0 ~ "+availableCars.length+"）：>>> ");
rentNumber = input.nextInt();
}
List<Integer> carsAlreadyPicked = new ArrayList<>();
for (int i = 1; i <= rentNumber; i++) {
System.out.print("请输入第"+i+"辆车的序号：>>> ");
int carID = input.nextInt();
while (carsAlreadyPicked.contains(carID) || carID < 1 || carID > availableCars.length) {
if (carID < 1 || carID > availableCars.length) {
System.out.print("无效输入。请重新输入：>>> ");
} else {
System.out.print("该车已选择。请重新选择：>>> ");
}
carID = input.nextInt();
}
carsAlreadyPicked.add(carID);
}
System.out.print("请输入租车天数（> 0）：>>> ");
int rentDay = input.nextInt();
while (rentDay <= 0) {
System.out.print("无效输入。请重新输入：>>> ");
rentDay = input.nextInt();
}
int totalExpense = 0, totalBusLoad = 0, totalBoatLoad = 0;
for (int id : carsAlreadyPicked) {
totalExpense += availableCars[id-1].getCarPrice();
}
totalExpense *= rentDay;
System.out.println("您的账单：");
System.out.println("***可载人的车有：");
for (int id : carsAlreadyPicked) {
Car car = availableCars[id-1];
if (availableCars[id-1] instanceof Bus || availableCars[id-1] instanceof Pickup) {
System.out.print(car.getCarName()+"\t");
totalBusLoad += (availableCars[id-1] instanceof Bus) ? ((Bus)car).getBusload() : ((Pickup)car).getBusload();
}
}
System.out.print("共载人："+totalBusLoad+"人\n");
System.out.println("***载货的车有：");
for (int id : carsAlreadyPicked) {
Car car = availableCars[id-1];
if (availableCars[id-1] instanceof Truck || availableCars[id-1] instanceof Pickup) {
System.out.print(car.getCarName()+"\t");
totalBoatLoad += (availableCars[id-1] instanceof Truck) ? ((Truck)car).getBoatload() : ((Pickup)car).getBoatload();
}
}
System.out.print("共载货："+(double)totalBoatLoad+"吨\n");
System.out.print("***租车总价格：");
System.out.print(totalExpense+"元\n");
input.close();
System.out.println("再见！欢迎下次使用！");
}
}
