設計一個租車系統，車有載貨和載人，也有既載貨又載人的車，模擬租車系統，實現一點小功能！

綜合運用所學知識，完善系統（異常處理，介面使用，封裝繼承等等~）

異常處理還是有些缺陷，對選車過程中輸錯序號還沒有很好的處理，等掌握的知識多了再來解決。

程式碼如下：

package example1;

public class Car {
	private int carNumber;
	private String carName;
	private int carMoney;
	public int getCarNumber() {
		return carNumber;
	}
	public void setCarNumber(int carNumber) {
		this.carNumber = carNumber;
	}
	public String getCarName() {
		return carName;
	}
	public void setCarName(String carName) {
		this.carName = carName;
	}
	public int getCarMoney() {
		return carMoney;
	}
	public void setCarMoney(int carMoney) {
		this.carMoney = carMoney;
	}
}
 

package example1;

public class PassengerCar extends Car {
	private int carCapacity;
	public PassengerCar(int carNumber,String carName,int carMoney,int carCapacity){
		this.setCarNumber(carNumber);
		this.setCarName(carName);
		this.setCarMoney(carMoney);
		this.carCapacity=carCapacity;
	}
	public int getCarCapacity() {
		return carCapacity;
	}

	public void setCarCapacity(int carCapacity) {
		this.carCapacity = carCapacity;
	}
}
 

package example1;

public class Trunk extends Car{
	private int carCarry;
    public Trunk(int carNumber,String carName,int carMoney,int carCarry){
        this.setCarNumber(carNumber);
        this.setCarName(carName);
        this.setCarMoney(carMoney);
        this.carCarry=carCarry;
    }
	public int getCarCarry() {
		return carCarry;
	}

	public void setCarCarry(int carCarry) {
		this.carCarry = carCarry;
	}
}
 

public class PickUp extends Car {
	    private int carCapacity; //定義皮卡的載客量
	    private int carCarry; //定義皮卡的載貨量
	     
	    public PickUp(int carNumber,String carName,int carRentMoney,int carCapacity,int carCarry){
	        this.setCarNumber(carNumber);
	        this.setCarName(carName);
	        this.setCarMoney(carRentMoney);
	        this.carCapacity=carCapacity;
	        this.carCarry=carCarry;
	    }

		public int getCarCapacity() {
			return carCapacity;
		}

		public void setCarCapacity(int carCapacity) {
			this.carCapacity = carCapacity;
		}

		public int getCarCarry() {
			return carCarry;
		}

		public void setCarCarry(int carCarry) {
			this.carCarry = carCarry;
		}
	 
	}

package example1;
import java.util.Scanner;
import java.util.*;

public class Test {

	public static void main(String[] args) {
		System.out.println("歡迎使用噠噠租車系統！\n");
		while(true){
			int kase=0;
	        System.out.println("您是否需要租車？ ：1 是   0 否");
	        try{
	        	Scanner input=new Scanner(System.in);
	            int k=input.nextInt();
	            if(k==1)
	            {
	            	kase=1;
	    	        System.out.println("您可租車的型別及價目表：");
	    	        Car [] carRent={new PassengerCar(1,"奧迪",500,4),new PassengerCar(2,"馬自達",400,4),
	    			new PickUp(3,"皮卡雪",450,4,2),new PassengerCar(4,"金龍",800,20),new Trunk(5,"松花江",400,4),new Trunk(6,"解放",500,5)
	    	    };
	    	    System.out.println("序號"+"\t"+"汽車名稱"+"\t"+"租金"+"\t"+"容量");
	    	    for (Car car : carRent) {
	                //用instanceOf來測試左邊型別的物件是否是右邊型別的例項，返回值為Boolean
	    	    	if(car instanceof PassengerCar){
	                //若它是客車型別的例項，則打印出客車應該有的屬性值，這裡注意強轉，否則不會出現
	                //passengerCar類的CarCapacity屬性
	                 System.out.println(car.getCarNumber()+"\t"+car.getCarName()+"\t"+car.getCarMoney()
	                                                  +"/天"+"\t"+"載人:"+((PassengerCar)car).getCarCapacity()+"人");
	                     }
	                if(car instanceof PickUp){
	                    System.out.println(car.getCarNumber()+"\t"+car.getCarName()+"\t"+car.getCarMoney()
	                                                  +"/天"+"\t"+"載人:"+((PickUp)car).getCarCapacity()+"人"+"\t"
	                                                  +"載貨:"+((PickUp)car).getCarCarry()+"噸");
	                }
	                if(car instanceof Trunk){
	                    System.out.println(car.getCarNumber()+"\t"+car.getCarName()+"\t"+car.getCarMoney()
	                                                  +"/天"+"\t"+"載貨:"+((Trunk)car).getCarCarry()+"噸");
	                }
	            }
	    	    System.out.println("請輸入您要租車的數量");
	    	    int n=input.nextInt();
	    	    List<Car> carList=new ArrayList<Car>();
	    	    int p=0;
	    	    List<Car> carList1=new ArrayList<Car>();
	    	    List<Car> carList2=new ArrayList<Car>();
	    	    int pnum=0;
	    	    int cnum=0;
	    	    int mnum=0;
	    	    for(int i=0;i<n;i++){
	    	    	System.out.println("請輸入第"+(i+1)+"輛車的序號: ");
	    		    int nnum=input.nextInt();
	    		    carList.add(carRent[nnum-1]);
	    		    System.out.println("成功新增："+carList.get(p).getCarName());
	    		    if(carRent[nnum-1] instanceof PassengerCar){
	    		    	pnum+=((PassengerCar)carList.get(p)).getCarCapacity();
	    			    mnum+=(carList.get(p)).getCarMoney();
	    			    carList1.add(carList.get(p));
	    			    }
	    		    if(carRent[nnum-1]instanceof PickUp){
	    		    	cnum+=((PickUp)carList.get(p)).getCarCarry();
	    			    pnum+=((PickUp)carList.get(p)).getCarCapacity();
	    			    mnum+=(carList.get(p)).getCarMoney();
	    			    carList2.add(carList.get(p));
	    			    carList1.add(carList.get(p));
	    		 }
	    		 if(carRent[nnum-1]instanceof Trunk){
	    			 cnum+=((Trunk)carList.get(p)).getCarCarry();
	    			 mnum+=(carList.get(p)).getCarMoney();
	                 carList2.add(carList.get(p));
	    		 }
	    		 p++; 
	    		 }
	    	    System.out.println("請輸入租車的天數：");
	    	    int dnum=input.nextInt();
	            mnum=mnum*dnum;
	            if(carList1.isEmpty()){
	            	System.out.println("沒有可以載客的車~");
	            	}
	            else{
	            	System.out.println("********************可載客的車有********************");
	                for (Car car : carList1) {
	                	System.out.println(car.getCarName());
	                	}
	                System.out.println("載客量為"+pnum+"人");
	                }
	            if(carList2.isEmpty()){
	            	System.out.println("沒有可以載客的車~");
	            	}
	            else{
	            	System.out.println("********************可載貨的車有********************");
	                for (Car car : carList2) {
	                	System.out.println(car.getCarName());
	                	}
	                System.out.println("載貨量為"+cnum+"噸");
	                }
	            System.out.println("********************租車的總價格********************");
	                System.out.println(mnum);
	                }
	            else if(k==0){
                        kase=1； 
	            	System.out.println("感謝您的再次使用！再見！");
	            	}
	            else{
	        	    System.out.println("您輸入的指令有誤，請重新輸入！");
	        	    }
	            }catch(Exception e){
	        	    System.out.println("請輸入數字！謝謝~");
	        	    }
	        if(kase==1)
	    	      break;
	        }
	}
}