跪求大神解答

Question

package com.chen1; import java.util.Scanner; public class Demo2 {             public static void main(String[] args) {    //创建可租车列表    Car[] carsForRent={new PassengerCar("奥迪A4",500,4),new PassengerCar("马自达6",400,4),    new PassengerCar("金龙",800,20),new Pickup("皮卡雪",450,2,4),    new Trunk("松花江",400,4),new Trunk("大阿肥",1000,20)};    System.out.println("欢迎使用达达租车系统");    System.out.println("您是否需要租车：1 是 \t其他任意键 否");  //获取并保存输入的值（一或者其他任意键）    Scanner scan=new Scanner(System.in);   String input=scan.next();  //判断是否进入租车系统   if(input.equals("1")){   System.out.println("你可租车类型及价目表");   System.out.println("序号\t汽车名称\t租金                 \t   容量");  int i=0;  for(Car currentCar:carsForRent){ //用instancreof判断是否属于汽车子类  if(currentCar instanceof PassengerCar){  i++;  System.out.println(""+i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()+"元/天\t"+((PassengerCar)currentCar).getpeopleCapacity()+"人\t"   );}  if(currentCar instanceof Trunk){  i++;  System.out.println(""+i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()+"元/天\t"+((Trunk)currentCar).getcargoCapacity()+"吨\t");}  if(currentCar instanceof Pickup){  i++;  System.out.println(""+i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()+"元/天\t"+((Pickup)currentCar).getCargoCapacity()+"吨\t"   +((Pickup)currentCar).getPeopleCapacity()+"人\t");}  }    System.out.println("请输入您要租车的数量：");  //获取并保存输入的值（租车的数量）  Scanner inputnum=new Scanner(System.in); int number=inputnum.nextInt();// 输入每辆租车的序号for(int j=1;j<=number;j++){System.out.println("请输入第"+j+"台车的序号：");Scanner inputnum1=new Scanner(System.in);int number1=inputnum1.nextInt();}//输入租车天数System.out.println("请输入租车天数：");Scanner inputnum2=new Scanner(System.in);int days=inputnum2.nextInt();//租车账单System.out.println("您的账单：");double total=0;Car car=new PassengerCar();total=car.getRent()*days;  System.out.println("***租车总价格:"+total); }      else {   System.out.println("您已退出达达租车系统!");   }                  }    } //汽车类class Car{ //成员属性String name; double carCapacity; double rent; //获取名字public String getName() { return name;}//设定名字public void setName(String name) { this.name = name;}//获取汽车容量public double getCarCapacity() { return carCapacity;}//设定汽车容量public void setCarCapacity(double carCapacity) { this.carCapacity = carCapacity;}//获取租金public double getRent() { return rent;}//设定租金public void setRent(double rent) { this.rent = rent;} }//子类卡车继承父类汽车class Trunk extends Car{ //卡车容量属性封装    private double cargoCapacity;//  构造方法  ，自动调用构造方法完成对新对象的初始化 public Trunk(String name,double rent,double cargoCapacity){ this.name=name; this.rent=rent; this.cargoCapacity=cargoCapacity; } //获取卡车载货容量 public double getcargoCapacity(){ return cargoCapacity; } }//子类客车继承父类汽车class PassengerCar extends Car{ //客车载入容量属性封装 private double peopleCapacity; //构造方法，完成对新对象的属性初始化public PassengerCar(String name,double rent,double peopleCapacity){ this.name=name; this.rent=rent; this.peopleCapacity=peopleCapacity; } //获取客车载入的容量public double getpeopleCapacity(){ return peopleCapacity;}}//子类class Pickup extends Car{ private double cargoCapacity; private double peopleCapacity; public Pickup(String name,double rent,double cargoCapacity,double peopleCapacity){ this.name=name; this.rent=rent; this.cargoCapacity=cargoCapacity; this.peopleCapacity=peopleCapacity; } public double getCargoCapacity() { return cargoCapacity; } public double getPeopleCapacity() { return peopleCapacity; } }

Answer 1

就后面这个写不出来

Answer 2

效果是这个