Detailed process of implementing car rental system in Java

package com.jinger;
public abstract class Car {
 public int rent;//日租金
 public int people;//载客人数
 public int loads;//载货量
 public String name;//车名
public int getRent(){
 return rent;
}
public void setRent(int rent){
 this.rent=rent;
}
public int getPeople(){
 return people;
}
public void setPeople(int people){
 this.people=people;
}
public int getLoads(){
 return loads;
}
public void setLoads(int loads){
 this.loads=loads;
}
public String getName(){
 return name;
}
public void setName(String name){
 this.name=name;
}
}

package com.jinger;
public class PassageCar extends Car{
 public PassageCar(String name,int people,int rent){
 this.setName(name);
 this.setPeople(people);
 this.setRent(rent);
 
 
 }
 
 public String toString(){
 return this.getName()+"\t"+this.getPeople()+"\t\t\t\t"+this.getRent();
 }
 }

package com.jinger;
public class Truck extends Car {
 public Truck(String name,int loads,int rent){
 this.setName(name);
 this.setLoads(loads);
 this.setRent(rent);
 }
 
 public String toString(){
 return this.getName()+"\t\t\t"+this.getLoads()+"\t\t"+this.getRent();
 }
 }

package com.jinger;
public class Pickup extends Car {
 public Pickup(String name,int people,int loads,int rent){
 this.setName(name);
 this.setPeople(people);
 this.setLoads(loads);
 this.setRent(rent);
 }
 
 public String toString(){
 return this.getName()+"\t"+this.getPeople()+"\t\t"+this.getLoads()+"\t\t"+this.getRent();
 }
 }

package com.jinger;
import java.util.*;
public class Initial {
 public static void main(String[] args) {
 //对各类车实例化并保存到cars数组
 Car[] cars={
 new PassageCar("奥迪A4",4,500),
 new PassageCar("马自达6",4,400),
 new Pickup("皮卡雪6",4,2,450),
 new PassageCar("金龙",20,800),
 new Truck("松花江",4,400),
 new Truck("依维柯",20,1000)};
 System.out.println("****欢迎使用达达租车系统！****");
 System.out.println("****您确认租车吗？****"+"\n"+"是（请输入1） \t 否（请输入2）");
 
 Scanner in1=new Scanner(System.in);
 int is=in1.nextInt();
 if(is!=1){
 System.out.println("****欢迎下次光临！****");
 System.exit(0);
 }
 if(is==1){
 System.out.println("****您可租车的类型及价目表****");
 System.out.println("序号"+"\t车名"+"\t载客数（人）"+"\t载货量（吨）"+"\t日租金（元/天）");
 
 //使用循环方式将各类车输出
 for(int i=0;i<cars.length;i++){
 System.out.println((i+1)+"\t"+cars[i]);
 }
 
 
 
 System.out.println("****请输入您的租车数量：****");
 int num1=in1.nextInt();
 Car[] rentcar=new Car[num1];
 int price=0;//总价格
 int totalpeople=0;//总人数
 int totalloads=0;//总载货量
 
 for(int i=0;i<num1;i++){
 System.out.println("****请输入第"+(i+1)+"辆车的序号：****");
 int numx=in1.nextInt();
 rentcar[i]=cars[numx-1];
 
 }
 System.out.println("****请输入天数：****");
 int day=in1.nextInt();
 for(int i=0;i<num1;i++){
 price=price+rentcar[i].rent *day;
 }
 System.out.println("****您的账单：****");
 System.out.println("已选载人车：");
 for(int i=0;i<num1;i++){
 if(rentcar[i].people!=0){
  System.out.println(rentcar[i].name+"\t");
 }
 
 totalpeople=totalpeople+rentcar[i].people;
 }
 
 System.out.println(&#39;\n&#39;);
 System.out.println("已选载货车：");
 for(int i=0;i<num1;i++){
 if(rentcar[i].loads!=0){
  System.out.println(rentcar[i].name+"\t");
 }
  
 totalloads=totalloads+rentcar[i].loads;
 }
 
 
  System.out.println(&#39;\n&#39;);
  System.out.println("共载客："+totalpeople+"人");
  System.out.println("共载货："+totalloads+"吨");
  System.out.println("租车总价格："+price+"元");
  System.out.println(&#39;\n&#39;);
  System.out.println("****感谢您的惠顾，欢迎再次光临！****");
 
 }
 }
 }