入口类
package text;
import java.util.Scanner;

public class Initail {

public static void main(String[] args) {
    // TODO 自动生成的方法存根
    Scanner input = new Scanner(System.in);
    Car[] Garage = {new PassengerCar("奥迪A4",4,500),new PassengerCar("马自达6",4,400),new PickUp("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)};             //建立车库。
    System.out.println("*******您是否要租车 (任意数.是  0.否)");
    int op = input.nextInt();
    if(op == 1){
    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      功能");
    for(int i=0;i<6;i++){
        Garage[i].print(i);                                             //循环遍历，打印车库中的类型
    }
    System.out.println("请输入您要租汽车的数量:");
    int num = input.nextInt();
    String zaike=" ";               //建立一个变量，用来存载客车的名字字符串
    String zaihuo=" ";              //建立一个变量，用来存载货车的名字字符串
    int passengeradd=0;             //建立一个变量，用来存一共载客的数量
    int tonnageadd=0;               //建立一个变量，用来存一共载货的重量
    int money = 0;                  //建立一个变量，用来存每天租车的费用
    for(int j=0;j<num;j++){
        System.out.println("请输入第"+(j+1)+"辆车的序号:");
        switch(input.nextInt()){    //选择结构，选择需要租的车，并且将选中的车的信息存入相应的变量中
        case 1 : zaike= zaike+Garage[0].name+"  ";
                 passengeradd+=Garage[0].passenger;
                 money+=Garage[0].price;
                 break;
        case 2 : zaike = zaike+Garage[1].name+" ";
                passengeradd+=Garage[1].passenger;
                money+=Garage[1].price;
                break;
        case 3 : zaike = zaike + Garage[2].name+"   ";
                zaihuo+=zaihuo+Garage[2].name+" ";
                passengeradd+=Garage[2].passenger;
                tonnageadd+=Garage[2].tonnage;
                money+=Garage[2].price;
                break;
        case 4 :zaike = zaike+ Garage[3].name+" ";
                passengeradd+=Garage[3].passenger;
                money+=Garage[3].price;
                break;
        case 5:zaihuo = zaihuo+Garage[4].name+" ";
                tonnageadd+=Garage[4].tonnage;
                money+=Garage[4].price;
                break;
        case 6: zaihuo = zaihuo+Garage[5].name+"    ";
                tonnageadd+=Garage[5].tonnage;
                money+=Garage[5].price;
                break;
        }   

    }
    System.out.println("请输入租车天数:");
    int day = input.nextInt();
    System.out.println("您的账单:");
    System.out.println("可载人的车有:");
    System.out.println(zaike+"  共载人:"+passengeradd+"人");
    System.out.println("可载货的车有:");
    System.out.println(zaihuo+" 共载货:"+tonnageadd+"吨");
    System.out.println("总价格:"+(money*day)+"元");}
    else{
        System.out.println("系统正在爆炸。");
    }
}

}

车库
package text;

public abstract class Car {
public String name; //车名
public int number;  //编号
public int passenger;   //载客人数
public int price;   //价钱
public int tonnage; //拉货吨数
public abstract void print(int i);  //输出列表

}

客车类
package text;

public class PassengerCar extends Car {

@Override
public void print(int i) {
    number = i + 1;
    System.out.println(number+".    "+name+"    "+price+"元/天        "+"载人:"+passenger+"人");
}
public PassengerCar(String name,int passenger,int price){
this.name = name;
this.price = price;
this.passenger = passenger;
    }
}

皮卡类
package text;

public class PickUp extends Car {
public void print(int i){
    number = i + 1 ;
    System.out.println(number+".    "+name+"    "+price+"元/天        "+"载人:"+passenger+"载货:"+tonnage+"人");
}

public PickUp(String name,int passenger,int tonnage,int price ){
this.name = name;
this.passenger = passenger;
this.tonnage = tonnage;
this.price = price;

}

}

货车类
package text;

public class Truck extends Car {

@Override
public void print(int i) {
    // TODO 自动生成的方法存根
    number = i + 1 ;
    System.out.println(number+".    "+name+"    "+price+"元/天        "+"载货:"+tonnage+"人");

}
public Truck(String name,int tonnage,int price){
this.name = name;
this.tonnage = tonnage;
this.price = price;

}
}