java第二季答答租车 结果全是0 求赐教？

Question

initial

package com.immoc;
import java.util.Scanner;
public class Initial {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
        System.out.println("欢迎使用");
        System.out.println("是否需要租车");
        Scanner input=new Scanner(System.in);
        System.out.println("1.是 2.否");
        int choice=input.nextInt();
        if(choice==1){
        	System.out.println("可用车辆价目表");
        	System.out.println("1.A    500元/天       载人:4人");
        	System.out.println("2.B    400元/天       载人:2人");
        	System.out.println("3.C    700元/天       载货:5吨");
        	System.out.println("4.D    1000元/天     载货:20吨");
        	System.out.println("5.E    450元/天       载人:2人     载货:2吨");
        	System.out.println("您需要租多少辆车？");
        int num=input.nextInt();
        ACar[] Car=new ACar[num];
        int i;	
        for(i=0;i<Car.length;i++){
        		System.out.println("请输入第"+(i+1)+"俩车的序号：");
        		switch(input.nextInt()){
        		case 1:
        			Car[i]=new A();
        			break;
        		case 2:
        			Car[i]=new B();
        			break;
        		case 3:
        			Car[i]=new C();
        			break;
        		case 4:
        			Car[i]=new D();
        			break;
        		case 5:
        			Car[i]=new E();
        			break;
        	    default:
        	    	System.out.println("无此序号！"); 
        	    input.close();
        		}
        	}
        System.out.println("请输入租车天数");
        int day=input.nextInt();
        int Allperson=0,Allcargo=0,price=0,personcount=0,cargocount=0;
            for(i=0;i<Car.length;i++){
                if(Car[i].cargo!=0){
                	cargocount++;
                	Allcargo=Car[i].cargo+Allcargo;
                }
                if(Car[i].person!=0){
                	personcount++;
                	Allperson=Car[i].person+Allperson;
                }
                price=price+Car[i].rent*day;
            }
            System.out.println("可载货的车辆数为"+cargocount);
            System.out.println("可载人的车辆数为"+personcount);
            System.out.println("共可载货"+Allcargo+"吨");
            System.out.println("共可载人"+Allperson+"位");
            System.out.println("总价位"+price+"元");
            input.close();
        	}
        else{
        	input.close();
            System.out.println("谢谢使用！");
        }
	}
}

ACar

package com.immoc;

public class ACar {
    public int person;
    public int cargo;
    public int rent;
    public String Name;
    public int NO;
    public  ACar(){
    	this.NO=0;
    	this.rent=0;
    	this.cargo=0;
    	this.person=0;
    	this.Name="";
    }
}

A

package com.immoc;

public class A extends ACar {
    public void ACar1(){
    	this.Name="A";
    	this.NO=1;
    	this.person=4;
    	this.cargo=0;
    	this.rent=500;
    }
}

B

package com.immoc;

public class B extends ACar {
    public void Acar2(){
    	this.NO=2;
    	this.person=2;
    	this.cargo=0;
    	this.Name="B";
    	this.rent=400;
    }
}

C

package com.immoc;

public class C extends ACar {
    public void ACar3(){
    	this.NO=3;
    	this.Name="C";
    	this.rent=700;
    	this.cargo=5;
    	this.person=0;
    }
}

D

package com.immoc;

public class D extends ACar {
    public void ACar4(){
    	this.NO=4;
    	this.Name="D";
    	this.rent=1000;
    	this.cargo=20;
    	this.person=0;
    }
}

E

package com.immoc;

public class E extends ACar {
    public void ACar5(){
    	this.NO=5;
    	this.Name="E";
    	this.rent=450;
    	this.person=2;
    	this.cargo=2;
    }
}