测试类

package coom.car_rental.java;

import java.util.Scanner;
/*
 * 这是测试主类
 */
public class CarRental implements cars{

    public static void main(String[] args) {
        // TODO 自动生成的方法存根

        System.out.println("欢迎使用达达租车系统！");
        System.out.println("请问您是否需要租车？ 0-否 1-是 ");
        Scanner sc = new Scanner(System.in);
        int op1 = sc.nextInt();
        switch (op1) {
        case 0:
            System.out.println("欢迎您使用达达租车系统!" + "n" + 
        "期待您的再次使用！" + "n" + "再见！");
            System.exit(0);

        case 1:
            System.out.println("您可租用车的数量及价格表");
            System.out.println("序号"+ "t车名" + "t车的载客量（人）" + "t车的载货量（吨）"
             + "t车的价格（天/元）");
            //循环输出车的信息
            for(int i = 0;i 

Car类

package coom.car_rental.java;

public abstract class Car {

    public String name;//车的名字
    public int carNumber;//租车数量
    public int busload;//载客量
    public int burden;//载货量
    public double dailyRent;//日租金

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

    public int getCarNumber() {
        return carNumber;
    }
    public void setCarNumber(int carNumber) {
        this.carNumber = carNumber;
    }
    public int getBusload() {
        return busload;
    }
    public void setBusload(int busload) {
        this.busload = busload;
    }
    public int getBurden() {
        return burden;
    }
    public void setBurden(int burden2) {
        this.burden = burden2;
    }
    public double getDailyRent() {
        return dailyRent;
    }
    public void setDailyRent(double dailyRent) {
        this.dailyRent = dailyRent;
    }

}

车库类

package coom.car_rental.java;

public interface cars {

    Car[] cars = { 
            new PassengerCar("奥迪A4", 4, 500),
            new PassengerCar("马自达6", 4, 400), 
            new PickupTruck("皮卡雪6", 4, 2, 450),
            new PassengerCar("金龙", 20, 800), 
            new Truck("松花江", 4, 400), 
            new Truck("依维柯", 20, 1000)};

}

卡车类

package coom.car_rental.java;
/*
 * 这是货车类，载货的
 */

public class Truck extends Car {

    public Truck(String name, int burden, double dailyRent) {
        // TODO 自动生成的构造函数存根
        this.setName(name);
        this.setBurden(burden);
        this.setDailyRent(dailyRent);
    }

    public String toString() {
        return this.getName() + "t" +this.getBurden() + "tt" + this.getDailyRent();
    }
}

客车类

package coom.car_rental.java;
/*
 * 这是客车类，载人的
 */
public class PassengerCar extends Car {

    public PassengerCar(String name, int busload,double dailyRent) {
        // TODO 自动生成的构造函数存根
        this.setName(name);
        this.setBusload(busload);
        this.setDailyRent(dailyRent);

    }

    public String toString() {
        return this.getName() +"t" + this.getBusload() + "tttt" + this.getDailyRent();

    }

}

皮卡类

package coom.car_rental.java;
/*
 * 这是皮卡车类，既可以载人也可以载货
 */
public class PickupTruck extends Car {

    public PickupTruck(String name, int busload, int burden, double dailyRent) {
        // TODO 自动生成的构造函数存根
        this.setName(name);
        this.setBusload(busload);
        this.setBurden(burden);
        this.setDailyRent(dailyRent);
    }

    public String toString () {
        return this.getName() + "t" + this.getBusload() + "tt"
    + this.getBurden() + "tt" + this.getDailyRent();

    }
}