欢迎您来到嗒嗒租车系统（初级版）

父类
public class Car {
private int num;
private String name;
private int rent;
private int manned;
private int burden;

public int getManned() {
    return manned;
}

public void setManned(int manned) {
    this.manned = manned;
}

public int getBurden() {
    return burden;
}

public void setBurden(int burden) {
    this.burden = burden;
}

public int getNum() {
    return num;
}

public void setNum(int num) {
    this.num = num;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public int getRent() {
    return rent;
}

public void setRent(int rent) {
    this.rent = rent;
}

public Car(int num,String name,int rent){
    this.num=num;
    this.name=name;
    this.rent=rent;
}

}

载人的子类
public class MannedCar extends Car{
private int manned;
public int getManned(){
return manned;
}
public void setManned(int manned){
this.manned=manned;
}
public MannedCar(int num,String name,int rent,int manned){
super(num,name,rent);
this.manned=manned;

}

}

载货的子类
public class BurdenCar extends Car {
private int burden;
public int getBurden(){
return burden;
}
public void setBurden(int burden){
this.burden=burden;
}

public BurdenCar(int num,String name,int rent,int burden){
    super(num,name,rent);
    this.burden=burden;
}

}

既载人也载货的子类
public class BothCar extends Car {
private int manned;
private int burden;

public int getManned(){
    return manned;
}

public void setManned(int manned){
    this.manned=manned;
}

public int getBurden(){
    return burden;
}
public void setBurden(int burden){
    this.burden=burden;
}

public BothCar(int num,String name,int rent,int manned,int burden){
    super(num,name,rent);
    this.manned=manned;
    this.burden=burden;

}

}

主要方法类
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("欢迎您来到嗒嗒租车系统：");
System.out.println("您是否要租车呢？1是，0否");
Scanner input=new Scanner(System.in);
int a=input.nextInt();
if(a==1){
System.out.println("您可以租车的类型及价目表:");
System.out.println("序号 汽车名称 租金 容量");
Car[] types={new MannedCar(1,"奥迪A4",500,4),
new MannedCar(2,"马自达6",400,4),
new BothCar(3,"皮卡雪6",450,4,2),
new MannedCar(4,"金龙",800,20),
new BurdenCar(5,"松花江",400,4),
new BurdenCar(6,"依维柯",1000,20)};

        for(Car type:types){
            if(type instanceof MannedCar){
                System.out.println(type.getNum()+"\t"+type.getName()+"\t"+type.getRent()
                +"\t"+"载人:"+type.getManned());
            }else if(type instanceof BurdenCar){
                System.out.println(type.getNum()+"\t"+type.getName()+"\t"+type.getRent()
                +"\t"+"载货:"+type.getBurden());
            }else{
                System.out.println(type.getNum()+"\t"+type.getName()+"\t"+type.getRent()
                +"\t"+"载人:"+type.getManned()+"\t"+"载货:"+type.getBurden());
            }
        }

        System.out.println("请输入您要租车的数量：");
        Scanner input2=new Scanner(System.in);
        int num=input2.nextInt();
        while(num<=0){
            System.out.println("您输入有误，请重新输入：");
            num=input2.nextInt();
        }

        double rentSum=0;
        int mannedSum=0;
        double burdenSum=0;
        for(int j=1;j<=num;j++){
            System.out.println("请选择第"+j+"辆车");
            Scanner input3=new Scanner(System.in);
            int num2=input3.nextInt();
            while(num2<=0num2>types.length){
                System.out.println("您的输入有误，请重新输入：");
                num2=input3.nextInt();
            }
            if(types[num2-1] instanceof MannedCar){
                System.out.println("您选择了"+types[num2-1].getName()+"\t"+"租金为每天"
            +types[num2-1].getRent()+"元"+"\t"+"载客量为"+types[num2-1].getManned());
            }else if(types[num2-1] instanceof BurdenCar){
                System.out.println("您选择了"+types[num2-1].getName()+"\t"+"租金为每天"
                        +types[num2-1].getRent()+"元"+"\t"+"载货量为"+types[num2-1].getBurden());
            }else{
                System.out.println("您选择了"+types[num2-1].getName()+"\t"+"租金为每天"
            +types[num2-1].getRent()+"元"+"\t"+"载客量为"+types[num2-1].getManned()+"\t"+"载货量为"+types[num2-1].getBurden());
            }

            rentSum=rentSum+types[num2-1].getRent();
            mannedSum=mannedSum+types[num2-1].getManned();
            burdenSum=burdenSum+types[num2-1].getBurden();
        }

        System.out.println("您的账单是：");
        System.out.println("***总载客量为:"+mannedSum+"人");
        System.out.println("***总载货量为:"+burdenSum+"吨");
        System.out.println("***总共需要:"+rentSum+"元");

    }else if(a==0){
        System.out.println("谢谢您的使用！系统将自动退出！");
    }else {
        System.out.println("您的输入有误！系统将自动退出！");
    }   
 }

}