好久沒有敲代碼了 變得生疏和腦子不夠用了 用慕課來重溫下知識(shí)點(diǎn)還是很好的 這是我在看了老師解題所給出的部分代碼后自己補(bǔ)上的 每個(gè)類都用橫線分隔開了 主要由5個(gè)類組成 一個(gè)父類Car 三個(gè)子類Truck、PickUp、PassengerCar 和一個(gè)主函數(shù)類Main組成 本人寫的代碼很爛 寫在這里只是給更多幕友一個(gè)參考的地方 也說不上參考就是給大家隨便看下?

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package com.demo_h;

public class Car {

protected String name;

protected double 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;

}

}

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package com.demo_h;

public class Truck extends Car {

private double cargoCapacity;

public Truck(String name,double rent,double cargoCapacity)

{

this.name = name;

this.rent = rent;

this.setCargoCapacity(cargoCapacity);

}

public void setCargoCapacity(double cargoCapacity) {

this.cargoCapacity = cargoCapacity;

}

public double getCargoCapacity() {

return cargoCapacity;

}

}

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package com.demo_h;

public class PickUp extends Car {

private double peopleCapacity;

private double cargoCapacity;

public PickUp(String name,double rent,double peopleCapacity,double cargoCapacity)

{

this.name = name;

this.rent = rent;

this.setPeopleCapacity(peopleCapacity);

this.setCargoCapacity(cargoCapacity);

}

public void setCargoCapacity(double cargoCapacity) {

this.cargoCapacity = cargoCapacity;

}

public double getCargoCapacity() {

return cargoCapacity;

}

public void setPeopleCapacity(double peopleCapacity) {

this.peopleCapacity = peopleCapacity;

}

public double getPeopleCapacity() {

return peopleCapacity;

}

}

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package com.demo_h;

public class PassengerCar extends Car {

private double peopleCapacity;

public PassengerCar(String name,double rent,double peopleCapacity)

{

this.name = name;

this.rent = rent;

this.peopleCapacity = peopleCapacity;

}

public double getPeopleCapacity() {

return peopleCapacity;

}

public void setPeopleCapacity(double peopleCapacity) {

this.peopleCapacity = peopleCapacity;

}

}

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package com.demo_h;

import java.util.Scanner;

public class Main {

/*

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

//用父類數(shù)組指向子類實(shí)例化對(duì)象，并且用構(gòu)造方法賦值

Car[] carsForRent = {new PassengerCar("奧迪", 500, 4),new PassengerCar("馬自達(dá)", 400, 4),

new PassengerCar("金龍", 800, 20),new PickUp("皮卡雪", 450, 4, 2),

new Truck("松花江", 400, 4),new Truck("依維柯", 1000, 20)};

System.out.println("****歡迎來到答答租車系統(tǒng)****");

System.out.println("你是否要租車：1是 ?0否");

Scanner scan = new Scanner(System.in);

String input = scan.next();

if(input.equals("1"))

{

System.out.println("你可租車的類型及其價(jià)目表：");

System.out.println("序號(hào)\t汽車名稱\t租金\t容量");

int i = 1;

//顯示所有的車型

for(Car currentCar:carsForRent)//foreach循環(huán)顯示數(shù)組內(nèi)容

{

if(currentCar instanceof PassengerCar)//判斷是否指向當(dāng)前子類對(duì)象，然后進(jìn)行向下轉(zhuǎn)型

{

System.out.println(i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()

+"元/天\t載人"+(int)((PassengerCar) currentCar).getPeopleCapacity()+"人");

i++;

}

if(currentCar instanceof Truck)

{

System.out.println(i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()

+"元/天\t載貨"+((Truck) currentCar).getCargoCapacity()+"噸");

i++;

}

if(currentCar instanceof PickUp)

{

System.out.println(i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()

+"元/天\t載人"+(int)((PickUp) currentCar).getPeopleCapacity()+"人.載貨"+

((PickUp) currentCar).getCargoCapacity()+"噸");

i++;

}

}

System.out.println("請(qǐng)輸入您要汽車的數(shù)量");

int carNum = scan.nextInt();

int accout = 0;

int peopleNum = 0;

int cargoNum = 0;

Car[] carsForRent01 = new Car[carNum]; //此數(shù)組方便為打印車輛名字而建

if(carNum>0&&carNum<7)//限制汽車數(shù)量

{

for(int a=0;a<carNum;a++)

{

System.out.println("請(qǐng)輸入第"+(a+1)+"輛車的序號(hào)");

int num = scan.nextInt();

switch (num) { //用switch語句實(shí)現(xiàn)選擇以及對(duì)金額、載客量和數(shù)組的賦值

case 1:

accout = accout+500;

peopleNum = peopleNum+4;

carsForRent01[a] = carsForRent[0];

break;

case 2:

accout = accout+400;

peopleNum = peopleNum+4;

carsForRent01[a] = carsForRent[1];

break;

case 3:

accout = accout+450;

peopleNum = peopleNum+4;

cargoNum = cargoNum+2;

carsForRent01[a] = carsForRent[2];

break;

case 4:

accout = accout+800;

peopleNum = peopleNum+20;

carsForRent01[a] = carsForRent[3];

break;

case 5:

accout = accout+400;

cargoNum = cargoNum+4;

carsForRent01[a] = carsForRent[4];

break;

case 6:

accout = accout+1000;

cargoNum = cargoNum+20;

carsForRent01[a] = carsForRent[5];

break;

default:

System.err.println("輸入車輛序號(hào)不符合標(biāo)準(zhǔn)！");

break;

}

}

}

else

{

System.out.println("輸入汽車數(shù)量過大或則不符合標(biāo)準(zhǔn)！");

}

System.out.println("*****你的賬單*****");

System.out.println("---可載客的車有---");

for(Car currentCar:carsForRent01) //輸出可載客車的名字 注意進(jìn)行對(duì)象比較

{

if(currentCar instanceof PassengerCar)

{

System.out.print(currentCar.getName()+" ?");

}

}

System.out.println("共載人："+peopleNum+"人");

System.out.println("---可載貨的車有---");

for(Car currentCar:carsForRent01)

{

if((currentCar instanceof Truck)||(currentCar instanceof PickUp))

{

System.out.print(currentCar.getName()+" ?");

}

}

System.out.println("共載貨："+cargoNum+"噸");

System.out.println("租車總價(jià)格："+accout+"￥");

}

else

{

System.out.println("退出系統(tǒng) 歡飲下次光臨！");

System.exit(-1);

}

}

}