主类

public abstract class Vehicle {
    public int getPeople() {
        return people;
    }

    public void setPeople(int people) {
        this.people = people;
    }

    public int getCargo() {
        return cargo;
    }

    public void setCargo(int cargo) {
        this.cargo = cargo;
    }

    public int getPrice() {
        return price;
    }

    public void setPrice(int price) {
        this.price = price;
    }

    public String getName() {
        return name;
    }

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

    private int people;
    private int cargo;
    private int price;
    private String name;


    public abstract void show();
}

子类1

public class car extends Vehicle {
    public void show(){
        System.out.println("  "+getName()+"   "+getPrice()+"元/天   载人"+getPeople());
    }

}

子类2

public class pickup extends Vehicle {
    public void show(){
        System.out.println("  "+getName()+"   "+getPrice()+"元/天   载人"+getPeople()+"   载货"+getCargo());}
}

子类3

public class truck extends Vehicle {
    public void show(){
        System.out.println("  "+getName()+"   "+getPrice()+"元/天  载货"+getCargo()+"吨");}
}

main类

import java.util.Scanner;
import java.util.Arrays;
public class main {
    public static void main(String[] args) {
        System.out.println("欢迎使用大大租车系统");
        System.out.println("您是否要租车：1是 0否");
        Scanner input=new Scanner(System.in);
        int i=input.nextInt();
        switch (i){
            case 0:
                System.exit(0);
                break;
            case 1:
                System.out.println("您可租车的类型及其价格表如下");
                System.out.println("序号 汽车类型 租金 容量");
                Vehicle[] t=new Vehicle[6];//6是代表数组总个数，代表六种车子可以租
                t[0]=new car();
                t[0].setName("奥迪A4");
                t[0].setPrice(500);
                t[0].setPeople(4);
                t[1]=new car();
                t[1].setName("马自达6");
                t[1].setPrice(400);
                t[1].setPeople(4);
                t[2]=new pickup();
                t[2].setName("皮卡雪6");
                t[2].setPrice(450);
                t[2].setPeople(4);
                t[2].setCargo(2);
                t[3]=new car();
                t[3].setName("金龙");
                t[3].setPrice(800);
                t[3].setPeople(20);
                t[4]=new truck();
                t[4].setName("松花江");
                t[4].setPrice(400);
                t[4].setCargo(4);
                t[5]=new truck();
                t[5].setName("依维柯");
                t[5].setPrice(1000);
                t[5].setCargo(20);
                for (int j=0;j<6;j++){
                    System.out.print(j+1+"  ");
                    t[j].show();
                }
                System.out.println("请输入您要租车的数量：");
                Scanner n=new Scanner(System.in);
                int nn=n.nextInt();
                int zairen=0;
                int zaihuo=0;
                int sumprice=0;
                //String []sumname1=new String[nn];
                //String []sumname2=new String[nn];
                String sumname1="";
                String sumname2="";
                for (int xx=1;xx<=nn;xx++){
                    System.out.println("请输入第"+xx+"辆车的序号");
                    Scanner b=new Scanner(System.in);
                    int bb=b.nextInt();
                    zairen=zairen+t[bb-1].getPeople();
                    zaihuo=zaihuo+t[bb-1].getCargo();
                    sumprice=sumprice+t[bb-1].getPrice();
                    if (t[bb-1].getPeople()!=0){
                        sumname1=sumname1+t[bb-1].getName()+" ";
                    }
                    if(t[bb-1].getCargo()!=0){
                        sumname2=sumname2+t[bb-1].getName()+" ";
                    }
                }

                System.out.println("请输入租车的天数");
                Scanner tianshu=new Scanner(System.in);
                int day=tianshu.nextInt();
                sumprice=day*sumprice;

                System.out.println("载人车: "+sumname1);
                System.out.println(("载货车: "+sumname2));
                System.out.println("载人总数为"+zairen);
                System.out.println("载货总数为"+zaihuo);
                System.out.println("***租车总价为"+sumprice);




        }
    }
}