package?com.zuoye; import?java.util.Scanner; public?class?Initial?{ private?static?final?String?NULL=null; private?static?Scanner?input;????//用來輸入數據 public?static?void?main(String[]?args)?{ //?TODO?Auto-generated?method?stub for(;;){ //無條件執行語句，直到執行循環內部的跳出語句 System.out.println("歡迎使用租車系統！"); System.out.println("您是否需要租車1：是???2：否"); input=new?Scanner(System.in); int?i=input.nextInt(); //完成數據的輸入 if(i==1){ //顯示可以租車的信息 System.out.println("您可以租車的相關信息："); Car[]?car={new?PersonCar(1,"奧迪A4",500,4),new?PersonCar(2,"馬自達6",400,4),?new?PersonCar(3,"?金龍?",800,20), new?Pickup(4,"皮卡雪6",450,4,2),new?Truck(5,"松花江",400,4), new?Truck(6,"依維柯",1000,20)};????//初始化對象，建立Car類對象的數組car //遍歷car類對象輸出 System.out.println("序號"+"??名稱"+"??價格"+"??容量1"); for(Car?rendcar:car){ if(rendcar?instanceof?PersonCar){ //判斷是否有客車類對象的元素，輸出相關的信息 System.out.println(rendcar.getCarNum()+"?"+rendcar.getCarName()+"?"+rendcar.getCarPrice()+"/天"+"?"+ ((PersonCar)rendcar).getCarCapacity()+"人");????//注意這里必須進行強制類型轉換，轉換為客車類，否則無法調用輸出容量的信息 } if(rendcar?instanceof?Pickup){ //判斷是否有皮卡類對象的元素，輸出相關的信息 System.out.println(rendcar.getCarNum()+"?"+rendcar.getCarName()+"?"+rendcar.getCarPrice()+"/天"+"?"+ ((Pickup)rendcar).getCarCapacity()+"人"+"?"+((Pickup)rendcar).getCarryingCapacity()+"噸"); } if(rendcar?instanceof?Truck){ //判斷是否有貨車類對象的元素，輸出相關的信息 System.out.println(rendcar.getCarNum()+"?"+rendcar.getCarName()+"?"+rendcar.getCarPrice()+"/天"+"?"+ ((Truck)rendcar).getCarryingCapactity()); } //System.out.println(rendcar);???//直接輸出,輸出的是對象的哈希碼 } System.out.println("請輸入您的租車數量！"); int?rendNum=input.nextInt();???//獲取租車數量 String[]?name=new?String[rendNum];????//建立數組，保存租車的名稱 String[]?name2=new?String[rendNum]; int?sumCapacity=0; //計算總的載人數 int?sumCCapacity=0;?????//計算中的載貨量 int?sumPrice=0;?????????//計算總的價格 int?a=0; int?b=0; for(int?i1=0;i1<rendNum;i1++){ //獲取顧客租車的相關信息 System.out.println("請輸入租借的第"+(i1+1)+"輛車的編號"); int?num=input.nextInt(); System.out.println("請輸入租借天數"); int?day=input.nextInt(); switch(num){ case?1: sumPrice=sumPrice+car[0].getCarPrice()*day;????//計算租車費用 sumCapacity=sumCapacity+((PersonCar)car[0]).getCarCapacity();???//計算租車的載人量 case?2: sumPrice=sumPrice+car[1].getCarPrice()*day; sumCapacity=sumCapacity+((PersonCar)car[1]).getCarCapacity(); case?3: sumPrice=sumPrice+car[2].getCarPrice()*day; sumCapacity=sumCapacity+((PersonCar)car[2]).getCarCapacity(); case?4: sumPrice=sumPrice+car[3].getCarPrice()*day; if(car[3]?instanceof?Pickup){ sumCapacity=sumCapacity+((Pickup)car[3]).getCarCapacity(); sumCCapacity=sumCCapacity+((Pickup)car[3]).getCarryingCapacity();??????//計算租車的載貨量 }else{ System.out.println("數據出差錯?。?！"); } case?5: sumPrice=sumPrice+car[4].getCarPrice()*day; sumCCapacity=sumCapacity+((Truck)car[4]).getCarryingCapactity(); case?6: sumPrice=sumPrice+car[5].getCarPrice()*day; sumCCapacity=sumCapacity+((Truck)car[5]).getCarryingCapactity(); break; } //將選好的車分類 if(car[num-1]?instanceof?PersonCar){ //判斷是否為客車 name[a]=car[num-1].getCarName(); a++; }else?if(car[num-1]?instanceof?Pickup){ //判斷是否為皮卡 name[a]=car[num-1].getCarName(); name2[b]=car[num-1].getCarName(); a++; b++; }else?if(car[num-1]?instanceof?Truck){ //判斷是否為貨車 name2[b]=car[num-1].getCarName(); b++; } } //輸出客戶選擇的車的相關信息； System.out.println("您一共要租"+rendNum+"輛車！"); if(a!=0){ //通過a的大小來判斷客戶是否租借載人的車 System.out.println("載人的車有"); for(String?n1:name){ System.out.println(n1); } System.out.println("一共可以乘坐"+sumCapacity+"位乘客"); }else{ System.out.println("您沒有租借載人的車"); } if(b==0){ System.out.println("您沒有租借載貨的車"); }else{ System.out.println("載貨的車有"); for(String?n2:name2){ System.out.println(n2); } System.out.println("一共可以運輸"+sumCCapacity+"噸的貨物"); } System.out.println("您一共需要支付"+sumPrice+"元"); }else?if(i==2){ System.out.println("歡迎下次光臨！"); break; }else{ System.out.println("您的輸入有誤，系統自動退出！"); break; } } } }package?com.zuoye; public?class?Car?{ //創建汽車父類 private?int?carNum; private?String?carName; private?int?carPrice; public?Car(int?newCarNum,String?newCarName,int?newCarPrice){ this.setCarNum(newCarNum); this.setCarName(newCarName); this.setCarPrice(newCarPrice); } public?int?getCarNum()?{ return?carNum; } public?void?setCarNum(int?carNum)?{ this.carNum?=?carNum; } public?String?getCarName()?{ return?carName; } public?void?setCarName(String?carName)?{ this.carName?=?carName; } public?int?getCarPrice()?{ return?carPrice; } public?void?setCarPrice(int?carPrice)?{ this.carPrice?=?carPrice; } }package?com.zuoye; public?class?PersonCar?extends?Car?{ //客車類 private?int?carCapacity;????//載人量 public?PersonCar(int?newCarNum,String?newCarName,int?newCarPrice,int?newCarCapacoty){ super(newCarNum,newCarName,newCarPrice);? //顯式調用父類的構造方法 this.setCarCapacity(newCarCapacoty);??????//初始化載貨量 } public?int?getCarCapacity()?{ return?carCapacity; } public?void?setCarCapacity(int?carCapacity)?{ this.carCapacity?=?carCapacity; } }package com.zuoye;public class Pickup extends Car { //皮卡類 private int carCapacity; ? ? ?//載人量 private int carryingCapacity; ? ?//載貨量 public Pickup(int newCarNum,String newCarName,int newCarPrice,int newCarCapacity,int newCarryingCapacity){ super(newCarNum, newCarName, newCarPrice); this.setCarCapacity(newCarCapacity); ? ? //初始化載人量 this.setCarryingCapacity(newCarryingCapacity); ? ? ?//初始化載貨量 } public int getCarCapacity() { return carCapacity; } public void setCarCapacity(int carCapacity) { this.carCapacity = carCapacity; } public int getCarryingCapacity() { return carryingCapacity; } public void setCarryingCapacity(int carryingCapacity) { this.carryingCapacity = carryingCapacity; }}package com.zuoye;public class Truck extends Car { //貨車類 private int carryingCapactity; public Truck(int newCarNum,String newCarName,int newCarPrice,int newCarryingCapacity){ super(newCarNum, newCarName, newCarPrice); this.setCarryingCapactity(newCarryingCapacity); } public int getCarryingCapactity() { return carryingCapactity; } public void setCarryingCapactity(int carryingCapactity) { this.carryingCapactity = carryingCapactity; }}