Comprehensive Exercises for the Second Season of Java Introduction-Dada Car Rental System

Effect picture

1.car parent

public class Car {
    
    
	
	private String name;
	private double rent;
	// 没有无参构造方法，子类隐式调用就会报错!!!
	// 所以子类构造方法第一行要显示使用super
	public Car(String name, double rent){
    
    
		this.name = name;
		this.rent = rent;
	}
	public String getName() {
    
    
		return name;
	}
	public void setName(String name) {
    
    
		this.name = name;
	}
	public double getRent() {
    
    
		return rent;
	}
	public void setRent(double rent) {
    
    
		this.rent = rent;
	}
	
}

2. Passenger Car

public class PassengerCar extends Car {
    
    
	private int peopleCapacity;
	public PassengerCar(String name, double rent, int peopleCapacity){
    
    
		super(name,rent);
		this.peopleCapacity = peopleCapacity;
	}
	public double getPeopleCapacity() {
    
    
		return peopleCapacity;
	}
	public void setPeopleCapacity(int peopleCapacity) {
    
    
		this.peopleCapacity = peopleCapacity;
	}
	
}

3. Truck loaded with cargo

public class Truck extends Car {
    
    
	double cargoCapacity;
	public Truck (String name, double rent, double cargoCapacity){
    
    
		super(name,rent);
		this.cargoCapacity = cargoCapacity;
	}
	public double getCargoCapacity() {
    
    
		return cargoCapacity;
	}
	public void setCargoCapacity(double cargoCapacity) {
    
    
		this.cargoCapacity = cargoCapacity;
	}
	
}

4.PickUp pickup truck

public class PickUp extends Car {
    
    
	double cargoCapacity;
	int peopleCapacity;
	public PickUp(String name, double rent, double cargoCapacity, int peopleCapacity){
    
    
		super(name,rent);
		this.cargoCapacity = cargoCapacity;
		this.peopleCapacity = peopleCapacity;
	}
	public double getCargoCapacity() {
    
    
		return cargoCapacity;
	}
	public void setCargoCapacity(double cargoCapacity) {
    
    
		this.cargoCapacity = cargoCapacity;
	}
	public double getPeopleCapacity() {
    
    
		return peopleCapacity;
	}
	public void setPeopleCapacity(int peopleCapacity) {
    
    
		this.peopleCapacity = peopleCapacity;
	}
	
}

5. DadaInitial startup class

import java.util.Scanner;


public class DadaInitial {
    
    

	public static void main(String[] args) {
    
    
		// TODO Auto-generated method stub
		Car[] list = {
    
     
			new PassengerCar("奥迪A4", 500, 4), 
			new PassengerCar("马自达6", 400, 4), 
			new PickUp("皮卡雪6", 500, 4, 2), 
			new PassengerCar("金龙", 800, 20), 
			new Truck("松花江", 400, 4), 
			new Truck("依维柯", 1000, 20)
		};
		System.out.println("欢迎使用嗒嗒租车系统：");
		System.out.println("您是否需要租车：1是  0否");
		Scanner scan = new Scanner(System.in);
		int isIn = scan.nextInt();
		if(isIn == 1){
    
     // 1.判断是否进入租车系统
			System.out.println("您可租车的类型及价目表:");
			System.out.println("序号\t汽车名称\t租金\t\t容量");
			
			// 2.遍历所有对象，罗列车型租金
			int index = 1;
			for(Car currentCar: list){
    
    
				if(currentCar instanceof PassengerCar){
    
    
					PassengerCar car = (PassengerCar) currentCar;
					System.out.println(index + "\t" + car.getName() + "\t" + car.getRent() + "元/天\t载人："  + car.getPeopleCapacity() + "人 ");
				}else if(currentCar instanceof Truck){
    
    
					Truck car = (Truck) currentCar;
					System.out.println(index + "\t" + car.getName() + "\t" + car.getRent() + "元/天\t载货" + car.getCargoCapacity() + "吨");
				}else if(currentCar instanceof PickUp){
    
    
					PickUp car = (PickUp) currentCar;
					System.out.println(index + "\t" + car.getName() + "\t" + car.getRent() + "元/天\t载人：" + car.getPeopleCapacity() + "人  " + "载货：" + car.getCargoCapacity() + "吨");
				}
				index++;
			}
			// 3.获取用户租车数量
			System.out.println("请输入您要租车的数量");
			int carSum = scan.nextInt();
			int moneySum = 0;
			String peopleName = "";
			int peopleSum = 0;
			String cargoName = "";
			double cargoSum = 0;
			// 获取的同时记录车名和总容量
			for(int p = 1; p<=carSum; p++){
    
    
				System.out.println("请输入第" + p + "辆车的序号");
				int no = scan.nextInt();
				moneySum += list[no-1].getRent();
				if(list[no-1] instanceof PassengerCar){
    
    
					PassengerCar chooseCar = (PassengerCar) list[no-1];
					peopleName += "  " + chooseCar.getName();
					peopleSum += chooseCar.getPeopleCapacity();
				}else if(list[no-1] instanceof Truck){
    
    
					Truck chooseCar = (Truck) list[no-1];
					cargoName += "  " + chooseCar.getName();
					cargoSum += chooseCar.getCargoCapacity();
				}else if(list[no-1] instanceof PickUp){
    
    
					PickUp chooseCar = (PickUp) list[no-1];
					peopleName += "  " + chooseCar.getName();
					peopleSum += chooseCar.getPeopleCapacity();
					cargoName +="  " +  chooseCar.getName();
					cargoSum += chooseCar.getCargoCapacity();
				}
			}
			// 4.获取租车天数
			System.out.println("请输入租车天数：");
			int day = scan.nextInt();
			
			// 5.输出用户账单
			System.out.println("您的账单:");
			System.out.println("***可载人的车有：");
			System.out.println(peopleName + "  共载人" + peopleSum + "人");
			System.out.println("***可载货的车有：");
			System.out.println(cargoName + "  共载货" + cargoSum + "吨");
			System.out.println("***租车总价格：" + (day*moneySum) + "元");
			
		}else{
    
    
			System.out.println("期待您的下次光临，再见");
		}
		
	}



}