花了一个小时做好了

父类
package com.liuxiaodao;
public class Vehicle {	
public int carNumber;//车序列	
public String carName; //车名字	
public int rent;//租金	
public int personCapacity;//载客量	
public double freightVolume;//载货量
public String getCarName() {		
return carName;	}	
public void setCarName(String carName) {		
this.carName = carName;	}	
public int getRent() {		
return rent;	}	
public void setRent(int rent) {		
this.rent = rent;	}	
public int getCarNumber() {		
return carNumber;	}	
public void setCarNumber(int carNumber) {		
this.carNumber = carNumber;	}	
public int getPersonCapacity() {		
return personCapacity;	}	
public void setPersonCapacity(int personCapacity) {		
this.personCapacity = personCapacity;	}	
public double getFreightVolume() {		
return freightVolume;	}	
public void setFreightVolume(double freightVolume) {		
this.freightVolume = freightVolume;	}	
public void show() {		
// TODO Auto-generated method stub			}	
}

Passengercar类
package com.liuxiaodao;
public class Passengercar extends Vehicle {	
public Passengercar(int carNumber,String carName,int rent,int personCapacity) {		
this.setCarNumber(carNumber);		
this.setCarName(carName);		
this.setRent(rent);		
this.setPersonCapacity(personCapacity);	}		
public void show() {		
System.out.println( " "+carNumber + "\t"+carName +"\t" + rent +"一天" + "\t\t载客量" + personCapacity+"人");	}
}

 Pika类
public class Pika extends Vehicle{	
public Pika(int carNumber,String carName,int rent,int personCapacity,double freightVolume) {		
this.setCarName(carName);		
this.setCarNumber(carNumber);		
this.setRent(rent);		
this.setPersonCapacity(personCapacity);		
this.setFreightVolume(freightVolume);}	
public void show() {		
System.out.println(" "+carNumber + "\t"+carName +"\t" + rent + "一天" + "\t\t载客量" + personCapacity+ "人"+ "载货量" +freightVolume+"吨");	}}

Truck类

public class Truck extends Vehicle {

public Truck(int carNumber,String carName,int rent,double freightVolume) {

this.setCarName(carName);

this.setCarNumber(carNumber);

this.setRent(rent);

this.setFreightVolume(freightVolume);

}

public void show() {

System.out.println(" "+carNumber +"\t"+ carName +"\t" + rent +"一天" + "\t\t载货量" + freightVolume+"吨");

}

}

Text类

public class Text {

public static void main(String[] args) {

// TODO Auto-generated method stub

Vehicle a = new Passengercar(1,"奥迪A4",500,4);

Vehicle b = new Passengercar(2,"宝马3系",400,4);

Vehicle c = new Pika(3,"皮卡雪6",450,4,2);

Vehicle d = new Passengercar(4,"金龙",800,20);

Vehicle e = new Truck(5,"松花江",400,4);

Vehicle f = new Truck(6,"依维柯",1000,20);

Vehicle vehicle[] = {a,b,c,d,e,f,};

System.out.println("欢迎使用小叨租车系统：");

System.out.println("你是否需要租车：1是 0否");

Scanner input = new Scanner(System.in);//使用Scanner来实现用户输入

int in =input.nextInt();

if(in == 1) {

System.out.println("您可租车的类型及其价目表：");

System.out.println("编 号"+"\t  类 型"+"\t日租金/天"+"\t\t容量");

a.show();

b.show();

c.show();

d.show();

e.show();

f.show();

System.out.println("请输入您租车的数量：");

Scanner input2 = new Scanner(System.in);

int num = input2.nextInt();

System.out.println("请输入您要借租的天数");

Scanner input3 = new Scanner(System.in);

int day =input3.nextInt();

for(int i =0;i<num;i++) {

System.out.println("请输入第"+ (i+1) +"辆车的序号");

Scanner input4 = new Scanner(System.in);

int xuhao = input4.nextInt();

vehicle[i] =vehicle[xuhao-1];

}

System.out.println("统计完成\n您的账单如下：");

System.out.println("可以载人的有：");

for(int n=0;n<num;n++) {

if(vehicle[n].personCapacity != 0) {

System.out.println(vehicle[n].carName);

}

}

System.out.println("可以载货的有：");

for(int m=0;m<num;m++) {

if(vehicle[m].freightVolume !=0) {

System.out.println(vehicle[m].carName);

}

}

//统计账单金额数目

int sumPerson = 0;

double sumFreight = 0;

double sumRent = 0;

for(int x=0;x<num;x++) {

sumPerson =vehicle[x].personCapacity+sumPerson;

sumFreight = vehicle[x].freightVolume+sumFreight;

sumRent = vehicle[x].rent+sumRent;

}

System.out.println("总载客量："+sumPerson);

System.out.println("总载货量："+sumFreight);

System.out.println("总价格："+sumRent*day);

}else if(in == 0) {

System.out.println("再见，欢迎您下次使用！");

}

}

}