答答租车（封装+多态）@慕课网原创_慕课网

主类

package dadazuche;

import java.util.Scanner;

public class Initial {

/**
 * @param args
 */
public static void main(String[] args) {
    Initial initial = new Initial();
    // TODO Auto-generated method stub
    System.out.println("欢迎使用达达租车系统：");
    System.out.println("您是否要租车：1是0否");
    //选择是否租车
    int choose = initial.choose();
    if(choose==1){
        //打印价格类目表
        initial.carPrint();
                    //选择车子数量及序号
        initial.chooseCar();
    }

}

private void chooseCar() {
    // TODO Auto-generated method stub
    System.out.println("需要租用几辆车？");
    Scanner input = new Scanner(System.in);
    int n = input.nextInt();
    //总租金变量
    float sumPrice =0;

    for(int i=0;i<n;i++){
        System.out.println("第"+(i+1)+"辆车选择：");
        //输入车辆型号
        int flag= input.nextInt();
        //打印车辆信息
        sumPrice += this.choosePrint(flag);
    };
    System.out.println("请输入租车天数：");
    int m = input.nextInt();
    //打印总租金
    System.out.println("总租金为："+(sumPrice*m));
}

private float choosePrint(int flag) {
    // TODO Auto-generated method stub
    //初始化车实例
    Che[] che = {
            new KeChe("奥迪A4",600,4),
            new KeChe("马自达6",500,3),
            new PiKa("皮卡雪6",450,4,2),
            new KeChe("金龙",800,20),
            new HuoChe("松花江",400,4),
            new HuoChe("依维柯",1000,20)
            };
    //计费变量
    float sumPrice = 0;
    //打印选车信息
    if(che[flag-1] instanceof KeChe){
        System.out.println(che[flag-1].getBrand()+" "+che[flag-1].getPrice()+" "+che[flag-1].getZaikeliang());
        sumPrice +=che[flag-1].getPrice();
    }else if(che[flag-1] instanceof HuoChe){
        System.out.println(che[flag-1].getBrand()+" "+che[flag-1].getPrice()+" "+che[flag-1].getZaihuoliang());
        sumPrice +=che[flag-1].getPrice();
    }else{
        System.out.println(che[flag-1].getBrand()+" "+che[flag-1].getPrice()+" "+che[flag-1].getZaikeliang()+" "+che[flag-1].getZaihuoliang());
        sumPrice +=che[flag-1].getPrice();
    }
    return sumPrice;
}

private void carPrint() {
    // TODO Auto-generated method stub
    System.out.println("您可租车的类型及其价目表：" +"\n" 
            + "序号   汽车名称    租金  容量");
            System.out.println(
              "1.   奥迪A4    600元/天    载人：4人"+"\n"
            + "2.   马自达6    500元/天  载人：4人"+"\n"
            + "3.   皮卡雪6    450元/天  载人：4 载货：2吨"+"\n"
            + "4.   金龙  800元/天  载人：20人" +"\n"
            + "5.   松花江 400元/天  载货：4吨" +"\n"
            + "6.   依维柯 1000元/天 载货：20吨" +"\n");

}

private int choose() {
    // TODO Auto-generated method stub
    Scanner input = new Scanner(System.in);
    int choose = input.nextInt();
    int i;
    if(choose==0){
        System.out.println("欢迎再来！");
        i = 0;
    }else{
        System.out.println("欢迎使用租车系统！");
        i = 1;
    }
    return i;
}

}

车父类

package dadazuche;

public abstract class Che {
private int zaihuoliang;
private int zaikeliang;
private float price;
private String brand;

public int getZaihuoliang() {
    return zaihuoliang;
}
public void setZaihuoliang(int zaihuoliang) {
    this.zaihuoliang = zaihuoliang;
}
public int getZaikeliang() {
    return zaikeliang;
}
public void setZaikeliang(int zaikeliang) {
    this.zaikeliang = zaikeliang;
}
public float getPrice() {
    return price;
}
public void setPrice(float price) {
    this.price = price;
}
public String getBrand() {
    return brand;
}
public void setBrand(String brand) {
    this.brand = brand;
}

}

货车子类

package dadazuche;

public class HuoChe extends Che{
public HuoChe(String name,float price,int zaihuo) {
this.setBrand(name);
this.setPrice(price);
this.setZaihuoliang(zaihuo);
}
@Override
public int getZaihuoliang() {
// TODO Auto-generated method stub
return super.getZaihuoliang();
}

@Override
public void setZaihuoliang(int zaihuoliang) {
    // TODO Auto-generated method stub
    super.setZaihuoliang(zaihuoliang);
}

@Override
public float getPrice() {
    // TODO Auto-generated method stub
    return super.getPrice();
}

@Override
public void setPrice(float price) {
    // TODO Auto-generated method stub
    super.setPrice(price);
}

@Override
public String getBrand() {
    // TODO Auto-generated method stub
    return super.getBrand();
}

@Override
public void setBrand(String brand) {
    // TODO Auto-generated method stub
    super.setBrand(brand);
}

}

客车子类

package dadazuche;

public class KeChe extends Che {
public KeChe(String name,float price,int zaike){
this.setBrand(name);
this.setPrice(price);
this.setZaikeliang(zaike);
}

@Override
public int getZaikeliang() {
    // TODO Auto-generated method stub
    return super.getZaikeliang();
}

@Override
public void setZaikeliang(int zaikeliang) {
    // TODO Auto-generated method stub
    super.setZaikeliang(zaikeliang);
}

@Override
public float getPrice() {
    // TODO Auto-generated method stub
    return super.getPrice();
}

@Override
public void setPrice(float price) {
    // TODO Auto-generated method stub
    super.setPrice(price);
}

@Override
public String getBrand() {
    // TODO Auto-generated method stub
    return super.getBrand();
}

@Override
public void setBrand(String brand) {
    // TODO Auto-generated method stub
    super.setBrand(brand);
}

}

皮卡车子类

package dadazuche;

public class PiKa extends Che {
public PiKa(String name,float price,int zairen,int zaihuo){
this.setBrand(name);
this.setPrice(price);
this.setZaikeliang(zairen);
this.setZaihuoliang(zaihuo);
}
@Override
public int getZaihuoliang() {
// TODO Auto-generated method stub
return super.getZaihuoliang();
}

@Override
public void setZaihuoliang(int zaihuoliang) {
    // TODO Auto-generated method stub
    super.setZaihuoliang(zaihuoliang);
}

@Override
public int getZaikeliang() {
    // TODO Auto-generated method stub
    return super.getZaikeliang();
}

@Override
public void setZaikeliang(int zaikeliang) {
    // TODO Auto-generated method stub
    super.setZaikeliang(zaikeliang);
}

@Override
public float getPrice() {
    // TODO Auto-generated method stub
    return super.getPrice();
}

@Override
public void setPrice(float price) {
    // TODO Auto-generated method stub
    super.setPrice(price);
}

@Override
public String getBrand() {
    // TODO Auto-generated method stub
    return super.getBrand();
}

@Override
public void setBrand(String brand) {
    // TODO Auto-generated method stub
    super.setBrand(brand);
}

}