本來想幫你看看的...但是又沒有縮進,實在看不下去了.....確實也復雜了點 ?

以下是主程序，幾個類在百度網盤里。

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package com.imooc;

import java.util.*;

public class Initial {

public static void main(String[] args) {

// TODO Auto-generated method stub

//詢問是否使用

Scanner input = new Scanner(System.in);

System.out.println("----請問是（y）否（n）需要租車？（輸入y/n，按回車確認）");

String shuru = input.next();

if("n".equals(shuru)){

System.out.println("我怕我沒有機會，對你說一聲再見！");

System.out.println("慢走！");

}else{//啟動程序

DaDazuchexitong dada=new DaDazuchexitong();

dada.hello();

//創建子類對象

Tesla dada1=new Tesla();

Tieniu dada2=new Tieniu();

Pika dada3=new Pika();

Wuguidongche dada4=new Wuguidongche();

Zhongka dada5=new Zhongka();

dada1.chuancanshu();

dada1.show();

dada2.chuancanshu();

dada2.show();

dada3.chuancanshu();

dada3.show();

dada4.chuancanshu();

dada4.show();

dada5.chuancanshu();

dada5.show();

//選車提示

System.out.println("---下面選擇您所需的車子，按提示輸入，回車確認；若選擇完畢，請直接按回車。謝謝！");

int i=0;

//初始化分型變量

int zaikeliang1 = 0;

double zaihuoliang1=0;

int price1=0;

int zaikeliang2=0;

double zaihuoliang2=0;

int price2=0;

int zaikeliang3=0;

double zaihuoliang3=0;

int price3=0;

int zaikeliang4=0;

double zaihuoliang4=0;

int price4=0;

int zaikeliang5=0;

double zaihuoliang5=0;

int price5=0;

int shuliang1=0;

int shuliang2=0;

int shuliang3=0;

int shuliang4=0;

int shuliang5=0;

do{?

int shuliang=0;

int xuhao=0;

i+=1;

System.out.println("***您的第"+i+"輛車序號是（只需輸入序號）：");

xuhao=input.nextInt();

System.out.println("***數量（只需輸入數字）：");

shuliang=input.nextInt();

//分情況討論

switch(xuhao){

case 1:

shuliang1=shuliang;

zaikeliang1=shuliang*5;

zaihuoliang1=shuliang*0;

price1=shuliang*300;

break;

case 2:

shuliang2=shuliang;

zaikeliang2=shuliang*4;

zaihuoliang2=shuliang*0;

price2=shuliang*80;

break;

case 3:

shuliang3=shuliang;

zaikeliang3=shuliang*4;

zaihuoliang3=shuliang*5;

price3=shuliang*500;

break;

case 4:

shuliang4=shuliang;

zaikeliang4=shuliang*0;

zaihuoliang4=shuliang*0.4;

price4=shuliang*50;

break;

case 5:

shuliang5=shuliang;

zaikeliang5=shuliang*3;

zaihuoliang5=shuliang*10;

price5=shuliang*400;

break;

default :

System.out.println("抱歉，暫時找不到您所搜索的車輛，程序自動忽略");

break;

}

}while(input.nextInt() !=0 ?);

//輸出清單

System.out.println("輸入成功，稍等片刻。");

System.out.println("您選擇的車子為:");

System.out.println("1號"+shuliang1+"輛");

System.out.println("2號"+shuliang2+"輛");

System.out.println("3號"+shuliang3+"輛");

System.out.println("4號"+shuliang4+"輛");

System.out.println("5號"+shuliang5+"輛");

//計算結果

int sumzaike;

double sumzaihuo;

int sumprice;

? ?sumzaike = zaikeliang1+zaikeliang2+zaikeliang3+zaikeliang4+zaikeliang5;

? ?sumzaihuo=zaihuoliang1+zaihuoliang2+zaihuoliang3+zaihuoliang4+zaihuoliang5;

sumprice = price1+price2+price3+price4+price5;

//提示付款，歡迎下次光臨，祝您一路順風！

? ? ? ? System.out.println("總載客量："+sumzaike+"總載貨量："+sumzaihuo+"總價格："+sumprice);

? ? ? ? System.out.println("您可以向黃昊明經理咨詢相關事宜，然而這只是個測試系統。以上所述僅供測試，如有雷同，不勝榮幸。");

}

}

}

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幾個類一起上來吧！基類

package com.imooc;

public class DaDazuchexitong {

//歡迎語句

public void hello(){

System.out.println("歡迎使用 滴滴出行 旗下的噠噠租車系統！");

System.out.println("以下是我們的車輛信息：");

System.out.println("序號 ? ?型號 ? ? 載客量 ? ?載貨量 ? ? 價格");

}

//初始化變量

private String chexing;

private int zaikeliang;

private double zaihuoliang;

private int price;

//傳入參數

public void set(String chexing,int zaikeliang,double zaihuoliang,int price) {

this.zaihuoliang = zaihuoliang;

this.zaikeliang = zaikeliang;

this.price = price;

this.chexing = chexing;

}

//得到參數

public String getChexing() {

return chexing;

}

public int getPrice() {

return price;

}

public int getZaikeliang() {

return zaikeliang;

}

public double getZaihuoliang() {

return zaihuoliang;

}

//顯示車輛信息

public void show(){

System.out.println(chexing+" ? ?"+zaikeliang+"人 ? ? ? ? ? ?"+zaihuoliang+"噸 ? ? ? ? ? ? "+price+"元/天");

}

}

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5個子類

package com.imooc;

public class Tesla extends DaDazuchexitong {

//向父類傳數據的方法

public void chuancanshu(){

super.set("1. ?特斯拉",5,0,300);

}

}

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package com.imooc;

public class Tieniu extends DaDazuchexitong{

public void chuancanshu(){

super.set("2. ?眾泰鐵牛",4,0,80);

}

}

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package com.imooc;

public class Pika extends DaDazuchexitong{

//向父類傳數據的方法

public void chuancanshu(){

super.set("3. ?皮卡車",4,5,500);

}

}

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package com.imooc;

public class Wuguidongche extends DaDazuchexitong{

//向父類傳數據的方法

public void chuancanshu(){

super.set("4. ?無軌動車",0,0.4,50);

}

}

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package com.imooc;

public class Zhongka extends DaDazuchexitong{

//向父類傳數據的方法

public void chuancanshu(){

super.set("5. ?重型卡車",3,10,400);

}

}

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end