JAVA入门第二季综合练习尝试面向对象（代码还有误。QAQ）

/2016年3月28日 11:27:24
@author 围城
/

package com.imocc;

public abstract class Car {
public String name;
public double price;
public int Capacity;//人容量
public int GCapacity;//物容量
@Override
public String toString() {
return "Car [name=" + name + ", price=" + price + ", Capacity=" + Capacity + ", GCapacity=" + GCapacity + "]";
}

}

package com.imocc;

public class PeGoodsCar extends Car{

public PeGoodsCar(String string, int i, int j,int k) {
    name = string;
    price =i;
    Capacity =j;
    GCapacity =k;

    // TODO Auto-generated constructor stub
}

}

package com.imocc;

public class PersonCar extends Car {

public PersonCar(String string, int i, int j) {
    name = string;
    price =i;
    Capacity =j;//人容量

    // TODO Auto-generated constructor stub
}

}

package com.imocc;

public class GoodsCar extends Car {

public GoodsCar(String string, int i, int j) {
    name = string;
    price =i;
    GCapacity =j;//物容量

    // TODO Auto-generated constructor stub
}

}

package com.imocc;

import java.util.Scanner;

public class Main {
public static void main(String[] args){

    Car car[]={new PersonCar("奥迪A4",500, 4),
            new PersonCar("马自达",800,20),
            new PersonCar("松花江",500, 20),
            new GoodsCar("皮卡雪",400, 4),
            new GoodsCar("金龙",400, 4),
            new PeGoodsCar("依维柯",500,5,4)};

    Scanner sc = new Scanner(System.in);

    Car car2[]=car;
    Car car3[]=car;

    System.out.println("欢迎使用迪迪租车系统！");
    System.out.println("请输入1:租车 2:退出");
    int i = sc.nextInt();
    if (i == 1) {
        System.out.println("您可租车的类型及价目表:");
        System.out.println("序号  汽车名称            租金          容量");
        System.out.println("1：   奥迪A4        500元/天     载人:4人");
        System.out.println("2：   马自达      800元/天      载人:20人");
        System.out.println("3：   松花江      500元/天      载人:20人");
        System.out.println("4：   皮卡雪      400元/天    载物:4吨");

        System.out.println("5：   金龙       400元/天    载物:4吨");
        System.out.println("6：   依维柯      500元/天     载人:5人 载物4吨");
        System.out.println("请输入您要租车的数量:");
        int num = sc.nextInt();
        int sum = 0;
        int b=0;
        int c=0;

        for (int j = 1; j <= num; j++) {
            System.out.println("您要租的第" + j + "辆车序号是:");
            int k = sc.nextInt();

            if(k==1||k==2||k==4)
            {
                car2[b].name=car[k-1].name;
                b++;
            }
            else if(k==3||k==5)
            {
                car3[c].name= car[k-1].name;
                c++;
            }
            else if(k==6){
                car2[b].name =car[5].name;
                car3[c].name =car[5].name;
            }
            else
                System.out.println("输入有误!");

            switch (k) {
            case 1:
                sum = sum + 500;
                break;
            case 2:
                sum = sum + 800;
                break;
            case 3:
                sum = sum + 500;
                break;
            case 4:
                sum = sum + 400;
                break;
            case 5:
                sum = sum + 400;
                break;
            case 6:
                sum = sum + 500;
                break;

            }

        }
        System.out.println("请问你需要租借几天：");
        int h = sc.nextInt();
        System.out.println("***载人的车有：");
        for(int x=0;x<b;x++)
        {

            System.out.print(""+car2[b-1].name+"\t");
            b--;

        }
        System.out.println();
        System.out.print("***载货的车有：");
        for(int x=0;x<c;x++)
        {

            System.out.print(""+car3[c-1].name);
            c--;

        }
        System.out.println();

        System.out.println("共需要支付: " + (h * sum) + "￥");
    } else
        return;
}

}