父类：定义车

package com.imooc;

public class Car {
      private String name;//车的名字
      private int carNum;//车的编号
      private int price;//车的价格
      private int carrying;//载货量
      private int seatload;//载客量
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getCarNum() {
        return carNum;
    }
    public void setCarNum(int carNum) {
        this.carNum = carNum;
    }
    public int getPrice() {
        return price;
    }
    public void setPrice(int price) {
        this.price = price;
    }
    public int getCarrying() {
        return carrying;
    }
    public void setCarrying(int carrying) {
        this.carrying = carrying;
    }
    public int getSeatload() {
        return seatload;
    }
    public void setSeatload(int seatload) {
        this.seatload = seatload;
    }

}

子类：定义客车

package com.imooc;

public class keche extends Car {
        public keche(int carNum,String name,int price,int seatload){
            super.setCarNum(carNum);
            super.setName(name);
            super.setPrice(price);
            super.setSeatload(seatload);
        }
}

子类：定义卡车

package com.imooc;

public class kache extends Car {
        public kache(int carNum,String name,int price,int carrying){
        super.setCarNum(carNum);
        super.setName(name);
        super.setPrice(price);
        super.setSeatload(carrying);
    }
}

子类：定义皮卡

package com.imooc;

public class pcar extends Car {
        public pcar(int carNum,String name,int price,int carrying,int seatload){
        super.setCarNum(carNum);
        super.setName(name);
        super.setPrice(price);
        super.setCarrying(carrying);
        super.setSeatload(seatload);
    }
}

调用方法：

package com.imooc;

import java.util.Scanner;

public class dadazuche {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int s0=0;
        Car[] carFormat = {new keche(1,"奥迪A4",500,4),new keche(2,"马自达6",400,4),
                new pcar(3,"皮卡雪6",450,4,4),new keche(4,"金龙",800,20),
                new kache(5,"松花江",400,4),new kache(6,"依维柯",1000,20)};//车辆信息
        int sum;//车辆总辆
        System.out.println("欢迎使用哒哒租车系统：");
        System.out.println("您是否要租车：1是 0否");
        Scanner s = new Scanner(System.in);
        s0 = s.nextInt();
        int i,j;
        if (s0 == 0) 
        { 
            System.out.println("感谢使用"); 
        }
        if (s0 == 1)
        {   
            System.out.printf("序号\t汽车名称\t租金\t容量\t车型总量\n");
            for(i=0;i<6;i++)
            {   
                if(i<2){
                sum=500;    
                System.out.println(carFormat[i].getCarNum() + ".\t" + carFormat[i].getName() + "\t" + carFormat[i].getPrice() + "元/天\t" + "载人:" + carFormat[i].getSeatload() + "人\t" + sum ); 
                }
                if(i==2){
                sum =500;
                //System.out.println(carFormat[1].getCarNum() + ".\t" + carFormat[1].getName() + "\t" + carFormat[1].getPrice() + "元/天\t" + "载人:" + carFormat[1].getSeatload() + "人\t" + 500); 
                //System.out.println(carFormat[2].getCarNum() + ".\t" + carFormat[2].getName() + "\t" + carFormat[2].getPrice() + "元/天\t" + "载人:" + carFormat[2].getSeatload() + "人\t" + 500); 
                System.out.println(carFormat[i].getCarNum() + ".\t" + carFormat[i].getName() + "\t" + carFormat[i].getPrice() + "元/天\t" + "载人:" + carFormat[i].getSeatload() + "人\t " + "载货：" + carFormat[i].getCarrying() + "吨\t" + 500); 
                }
                if(i==3){
                    sum=500;    
                    System.out.println(carFormat[i].getCarNum() + ".\t" + carFormat[i].getName() + "\t" + carFormat[i].getPrice() + "元/天\t" + "载人:" + carFormat[i].getSeatload() + "人\t" + sum ); 
                    }
                if(i>3){
                sum =1000;
                System.out.println(carFormat[i].getCarNum() + ".\t" + carFormat[i].getName() + "\t" + carFormat[i].getPrice() + "元/天\t" + "载货:" + carFormat[i].getCarrying() + "吨\t" + sum); 
                //System.out.println(carFormat[5].getCarNum() + ".\t" + carFormat[5].getName() + "\t" + carFormat[5].getPrice() + "元/天\t" + "载货:" + carFormat[5].getCarrying() + "吨\t" + sum);
                }
            }
            System.out.println("请输入您要租汽车的数量：");
            int sn = s.nextInt();
            int a[] = new int[sn];//选择汽车的信息保存数组
            if(sn>6){
                System.out.println("输入的数量大于已有数量。");
            }
            if(sn<=6){
            for (j=0;j<sn;j++){
            System.out.println("请输入第"+(j+1)+"辆车的序号");
            Scanner s1 = new Scanner(System.in);
            a[j] = s1.nextInt();
            }
            System.out.println("请输入租车天数：");
            int d = s.nextInt();
            int cusNum =0;//载人数
            int bagNum =0;//载货数
            int sumPrice =0; //总价格
            System.out.println("您的账单:");
            //***********************************************************************
            System.out.println("****可载人的车有：");

                for(int aj=0;aj<sn;aj++){
                    if(a[aj]== 1|| a[aj] == 2|| a[aj] == 4 ){
                cusNum += carFormat[a[aj]-1].getSeatload();
                System.out.print(carFormat[a[aj]-1].getName() + "\t");
                }
                }   
                System.out.println("共载人："+ cusNum + "人");
            //**************************************************************************
            System.out.println("****可载货的车有：");
            for(int lj=0;lj<sn;lj++){
                if(a[lj]== 3|| a[lj] == 5|| a[lj] == 6 ){
            bagNum += carFormat[a[lj]-1].getCarrying();
            System.out.print(carFormat[a[lj]-1].getName() + "\t");
            }
            }   
            System.out.println("共载货："+ bagNum + "吨");
            System.out.print("****租车总价格：");
            for(int bj=0;bj<sn;bj++){
                sumPrice += carFormat[bj].getPrice()*d; 
            }
            System.out.print(sumPrice);
            }
            }

        }

    }