Java入门第二季最后课题练习（问题多多）

程序要求
多态父类car

package dadaren;

public abstract class car {
    int ID;
    String carName;
    int rent;
    int zairen;
    int zaihuo;
    public abstract void zai();

}

子类aodi

package dadaren;

public class aodi extends car {
    int ID=1;
    String carName="奥迪A4";
    int rent=500;
    int zairen=4;
    int zaihuo=0;
    String zais;

    @Override
    public void zai() {

        if(zairen>0 && zaihuo>0) {
            zais="载人："+zairen+"人；"+"载货："+zaihuo+"吨";
        }else if(zairen>0){
            zais="载人："+zairen+"人";
        }else {
            zais="载货："+zaihuo+"吨";
        }
        // TODO Auto-generated method stub
        System.out.println(ID+"\t"+carName+"\t"+rent+"元/天\t"+zais);

    }

}

子类pika

package dadaren;

public class pika extends car {
    int ID=2;
    String carName="皮卡雪6";
    int rent=450;
    int zairen=4;
    int zaihuo=2;
    String zais;

    @Override
    public void zai() {

        if(zairen>0 && zaihuo>0) {
            zais="载人："+zairen+"人；"+"载货："+zaihuo+"吨";
        }else if(zairen>0){
            zais="载人："+zairen+"人";
        }else {
            zais="载货："+zaihuo+"吨";
        }
        // TODO Auto-generated method stub
        System.out.println(ID+"\t"+carName+"\t"+rent+"元/天\t"+zais);

    }

}

子类jinlong

package dadaren;

public class jlong extends car {
    int ID=3;
    String carName="金龙";
    int rent=800;
    int zairen=20;
    int zaihuo=0;
    String zais;

    @Override
    public void zai() {

        if(zairen>0 && zaihuo>0) {
            zais="载人："+zairen+"人；"+"载货："+zaihuo+"吨";
        }else if(zairen>0){
            zais="载人："+zairen+"人";
        }else {
            zais="载货："+zaihuo+"吨";
        }
        // TODO Auto-generated method stub
        System.out.println(ID+"\t"+carName+"\t"+rent+"元/天\t"+zais);

    }

}

子类shjiang

package dadaren;

public class shjiang extends car {
    int ID=4;
    String carName="松花江";
    int rent=400;
    int zairen=0;
    int zaihuo=4;
    String zais;

    @Override
    public void zai() {

        if(zairen>0 && zaihuo>0) {
            zais="载人："+zairen+"人；"+"载货："+zaihuo+"吨";
        }else if(zairen>0){
            zais="载人："+zairen+"人";
        }else {
            zais="载货："+zaihuo+"吨";
        }
        // TODO Auto-generated method stub
        System.out.println(ID+"\t"+carName+"\t"+rent+"元/天\t"+zais);

    }

}

子类mzda

package dadaren;

public class mzda extends car {
    int ID=5;
    String carName="马自达6";
    int rent=400;
    int zairen=4;
    int zaihuo=0;
    String zais;

    @Override
    public void zai() {

        if(zairen>0 && zaihuo>0) {
            zais="载人："+zairen+"人；"+"载货："+zaihuo+"吨";
        }else if(zairen>0){
            zais="载人："+zairen+"人";
        }else {
            zais="载货："+zaihuo+"吨";
        }
        // TODO Auto-generated method stub
        System.out.println(ID+"\t"+carName+"\t"+rent+"元/天\t"+zais);

    }

}

子类ywke

package dadaren;

public class ywke extends car {
    int ID=6;
    String carName="依维柯";
    int rent=1000;
    int zairen=0;
    int zaihuo=20;
    String zais;

    @Override
    public void zai() {

        if(zairen>0 && zaihuo>0) {
            zais="载人："+zairen+"人；"+"载货："+zaihuo+"吨";
        }else if(zairen>0){
            zais="载人："+zairen+"人";
        }else {
            zais="载货："+zaihuo+"吨";
        }
        // TODO Auto-generated method stub
        System.out.println(ID+"\t"+carName+"\t"+rent+"元/天\t"+zais);

    }

}

---

主程序test

package dadaren;
import java.util.Scanner;
public class test {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        aodi c1=new aodi();
        pika c2=new pika();
        jlong c3=new jlong();
        shjiang c4=new shjiang();
        mzda c5=new mzda();
        ywke c6=new ywke();
        Scanner input=new Scanner(System.in);//创建Scanner对象
        System.out.println("欢迎使用达达租车系统："+"\n你是否要租车：1是 0否");
        int isRen=input.nextInt();
        if(isRen==1) {
            System.out.println("你可租车的类型及其价目表：");
            System.out.println("序号"+"\t汽车类型"+"\t日租"+"\t1容量");
            c1.zai();
            c2.zai();
            c3.zai();
            c4.zai();
            c5.zai();
            c6.zai();

            System.out.println("输入租车数量：");
            int carNum=input.nextInt();
            int cID[]=new int[carNum];
            int adNum=0;
            int pkNum=0;
            int jlNum=0;
            int shjNum=0;
            int mzdNum=0;
            int ywkNum=0;
            //翻牌
            for(int i=0;i<carNum;i++) {
                System.out.println("请输入第"+(i+1)+"辆车的序号");
                cID[i]=input.nextInt();
            }
            //取货
            for(int j=0;j<carNum;j++) {
                switch(cID[j]) {
                case 1:
                    adNum++;
                    break;
                case 2:
                    pkNum++;
                    break;
                case 3:
                    jlNum++;
                    break;
                case 4:
                    shjNum++;
                    break;
                case 5:
                    mzdNum++;
                    break;
                case 6:
                    ywkNum++;
                    break;

                }

            }
            //租金*车的数量;载人数量*车的数量；载货数量*车的数量
            c1.rent*=adNum;
            c1.zairen*=adNum;
            c1.zaihuo*=adNum;
            c2.rent*=pkNum;
            c2.zairen*=pkNum;
            c2.zaihuo*=pkNum;
            c3.rent*=jlNum;
            c3.zairen*=jlNum;
            c3.zaihuo*=jlNum;
            c4.rent*=shjNum;
            c4.zairen*=shjNum;
            c4.zaihuo*=shjNum;
            c5.rent*=mzdNum;
            c5.zairen*=mzdNum;
            c5.zaihuo*=mzdNum;
            c6.rent*=ywkNum;
            c6.zairen*=ywkNum;
            c6.zaihuo*=ywkNum;
            int zr=c1.zairen+c2.zairen+c3.zairen+c4.zairen+c5.zairen+c6.zairen;
            int zh=c1.zaihuo+c2.zaihuo+c3.zaihuo+c4.zaihuo+c5.zaihuo+c6.zaihuo;

            //租的天数
            System.out.println("输入你要租的天数：");
            int rentDay=input.nextInt();
            int zRent=c1.rent*rentDay+c2.rent*rentDay+c3.rent*rentDay+c4.rent*rentDay+c5.rent*rentDay+c6.rent*rentDay;
            //账单
            System.out.println("你的订单：");
            //载人车
            if(adNum>0 && c1.zairen>0) {System.out.println("***可载人的车有："+c1.carName);};
            if(pkNum>0 && c2.zairen>0) {System.out.println("***可载人的车有："+c2.carName);};
            if(jlNum>0 && c3.zairen>0) {System.out.println("***可载人的车有："+c3.carName);};
            if(shjNum>0 && c4.zairen>0) {System.out.println("***可载人的车有："+c4.carName);};
            if(mzdNum>0 && c5.zairen>0) {System.out.println("***可载人的车有："+c5.carName);};
            if(ywkNum>0 && c6.zairen>0) {System.out.println("***可载人的车有："+c6.carName);};
            System.out.println("可共载人："+zr+"个.");
            //载货车
            if(adNum>0 && c1.zaihuo>0) {System.out.println("***可载人的车有："+c1.carName);};
            if(pkNum>0 && c2.zaihuo>0) {System.out.println("***可载人的车有："+c2.carName);};
            if(jlNum>0 && c3.zaihuo>0) {System.out.println("***可载人的车有："+c3.carName);};
            if(shjNum>0 && c4.zaihuo>0) {System.out.println("***可载人的车有："+c4.carName);};
            if(mzdNum>0 && c5.zaihuo>0) {System.out.println("***可载人的车有："+c5.carName);};
            if(ywkNum>0 && c6.zaihuo>0) {System.out.println("***可载人的车有："+c6.carName);};
            System.out.println("可共载货："+zh+"吨。");
            System.out.println("租车总价格："+zRent+"元。");
            System.out.println("感谢使用！");
        }
    }

}

主程序中

        aodi c1=new aodi();        pika c2=new pika();
        jlong c3=new jlong();        shjiang c4=new shjiang();
        mzda c5=new mzda();        ywke c6=new ywke();
        本打算用
        car c1=new aodi(); .....car c6=new ywke();
        后面1.
        c1.rent的值 该值为car.rent的值 无法真正取到子类aodi.rent值
        不知道这里怎么改进
       2.无法用for遍历c1,c2,c3,c4,c5,c6循环获取方法