JAVA哒哒租车系统

父类
package dada;
public class Car {	
   int id;	
   String name;	
   int price;	
   int capacity;	
   int num;   
   public Car(int id,String name,int price,int capacity) {    	
            this.id=id;    	
            this.name=name;    	
            this.price=price;    	
            this.capacity=capacity;    
   }   
   public Car(int id,String name,int price,int capacity,int num) {    	
          this.id=id;    	
          this.name=name;    	
          this.price=price;    	
          this.capacity=capacity;		
          this.num=num;    	
          this.num=num;  
   }
}

子类PersonCar（客车）
package dada;
public  class PersonCar extends Car{	
    public PersonCar(int id, String name, int price, int capacity) {	
	   super(id, name, price, capacity);	
	}
}

子类GoodsCar（货车）
package dada;
public class GoodsCar extends PersonCar {    
   public GoodsCar(int id, String name, int price, int capacity) {	
 	super(id, name, price, capacity);		
   }	 
}

子类Pk（皮卡）
package dada;
public class Pk extends Car {	
      public Pk(int id, String name, int price, int capacity,int num) {	
	super(id, name, price, capacity,num);	
       }
}

main（）：
package dada;
import java.util.*;
public class Dada {	
     public static void main(String[] args) {	  
         Car car1=new PersonCar(1, "奥迪", 500, 4);	  
         Car car2=new PersonCar(2, "马自达", 400, 4);	
         Car car3=new PersonCar(3, "金龙", 800, 20);  
         Car car4=new GoodsCar(4, "松花江", 400, 4);	 
         Car car5=new GoodsCar(5, "依维柯", 1000, 20);	  
         Car car6=new Pk(6, "皮卡", 450,4,2);	
         System.out.println("欢迎使用哒哒租车系统："+"\n"+"您是否要租车：1是0否");
         Scanner scan=new Scanner(System.in);	
         int zu=scan.nextInt();	
        if(zu==1){		
             System.out.println("您可租车的类型及其价目表："+"\n"+"序号"+"\t"+"汽车名称"+"\t"+"租金"+"\t"+"容量");		
             System.out.println(car1.id+"\t"+car1.name+"\t"+car1.price+"/天"+"\t"+"载客:"+car1.capacity+"人");		
             System.out.println(car2.id+"\t"+car2.name+"\t"+car2.price+"/天"+"\t"+"载客:"+car2.capacity+"人");		
             System.out.println(car3.id+"\t"+car3.name+"\t"+car3.price+"/天"+"\t"+"载客:"+car3.capacity+"人");		
             System.out.println(car4.id+"\t"+car4.name+"\t"+car4.price+"/天"+"\t"+"载货:"+car4.capacity+"吨");		
             System.out.println(car5.id+"\t"+car5.name+"\t"+car5.price+"/天"+"\t"+"载货:"+car5.capacity+"吨");		
             System.out.println(car6.id+"\t"+car6.name+"\t"+car6.price+"/天"+"\t"+"载人:"+car6.capacity+"人,"+"载货:"+car6.num+"吨");		
             System.out.println("请输入您要租车数量：");		
             int shu=scan.nextInt();		
             int[] list=new int[shu];		
             for(int a=0;a<shu;a++) {			
                 System.out.println("请输入第"+(a+1)+"辆车的序号:");			
                 int xu=scan.nextInt();			
                 list[a]=xu;			
             }		 	    
             System.out.println("选的车序号"+Arrays.toString(list)); 		
             System.out.println("请输入租车天数："); 		
             int tian=scan.nextInt();				
             System.out.println("您的账单："); 		
             System.out.println("可载人的车有："); 		
             int q = 0,w = 0,e = 0,r = 0,s = 0,d = 0,f = 0,z = 0,x=0,c=0,v=0,b=0,n=0,p=0,l=0;	    
             for(int i=0;i<shu;i++){		  
                if(list[i]==1) {			  
                  System.out.print("奥迪"+"\t");			  
                  q=car1.capacity;			  
                  z=car1.price;		  
                }else if(list[i]==2) {			  
                  System.out.print("马自达"+"\t");			  
                  w=car2.capacity;			  
                  x=car2.price;		  
                }else if(list[i]==3) {			  
                  System.out.print("金龙"+"\t");			 
                  e=car3.capacity;			  
                  c=car3.price;		  
                   }else if(list[i]==6) {			  
                       System.out.print("皮卡"+"\t");			  
                       r=car6.capacity;			  
                       v=car6.price;		  
                   }	    
             }	    
             p=z+x+c+v;		
             System.out.println("可载人："+(q+w+e+r)+"人");			    
             System.out.println("可载货的车有：");	    
             for(int i=0;i<shu;i++) {			  
                 if(list[i]==4) {				  
                    System.out.print("松花江"+"\t");				  
                    s=car4.capacity;				  
                    b=car4.price;			  
                 }else if(list[i]==5) {				  
                    System.out.print("依维柯"+"\t");				  
                    d=car5.capacity;				  
                    n=car5.price;			  
                 }else if(list[i]==6) {				  
                    System.out.print("皮卡"+"\t");				  
                    f=car6.num;							  
                 }		
             }	    
             l=b+n;	    
             System.out.println("可载货："+(s+d+f)+"吨");	    	    
             System.out.println("租车总价格："+(p+l)*tian+"元");	    	    	    	    	    	    	
         }else{		
          System.out.println("感谢使用");	
         }  
     }
}