本系统用java语言所写，不涉及任何框架。纯JavaSE基础，本人练习所写。
需求
设计一个简易的租车系统，要求实现租车，并统计车型、载客数、载人数、租赁总价钱。
题目来自： imooc的《Java入门第二季》
思路
- 设计一个Car类，作为各个汽车类的父类，然后设计几种汽车类型继承该父类。
- 汽车出租类。完成租赁任务
Car类
/**
* Project: Lease System
* Cars: 汽车类（客车、货车、卡车）
* @author Gyl
*/
public class Car {
private String s_name; // 汽车名字
private int i_price; // 租赁价格
public String getName() {
return s_name;
}
public void setName(String name) {
this.s_name = name;
}
public int getPrice() {
return i_price;
}
public void setPrice(int price) {
this.i_price = price;
}
}Bus类
/**
* 客车类
* @author Gyl
*
*/
class Bus extends Car{
private int capcity; // 客车载客量
public Bus(String name, int price, int capcity) {
super(); // 不写，系统默认调用
this.capcity = capcity;
super.setName(name);
super.setPrice(price);
}
public int getCapcity() {
return capcity;
}
public void setCapcity(int capcity) {
this.capcity = capcity;
}
public String toString() {
return this.getName() + "\t" +this.getPrice()+ "元/天\t载人:" + capcity + "人";
}
}Pickup类
/**
* 卡车类
* @author Gyl
*
*/
class Pickup extends Car{
private int personNum;
private int goodsNum;
public Pickup(String name, int price, int personNum, int goodsNum) {
super();
this.goodsNum = goodsNum;
this.personNum = personNum;
super.setName(name);;
super.setPrice(price);
}
public int getPersonNum() {
return personNum;
}
public void setPersonNum(int personNum) {
this.personNum = personNum;
}
public int getGoodsNum() {
return goodsNum;
}
public void setGoodsNum(int goodsNum) {
this.goodsNum = goodsNum;
}
public String toString() {
return this.getName() + "\t" + this.getPrice() + "元/天\t载人:" + personNum + "人\t载货:" + goodsNum;
}
}Trunk类
/**
* 货车类
* @author Gyl
*
*/
class Trunk extends Car{
private int goodsNum;
public Trunk(String name, int price, int goodsNum) {
super();
this.goodsNum = goodsNum;
super.setName(name);
super.setPrice(price);
}
public int getGoodsNum() {
return goodsNum;
}
public void setGoodsNum(int goodsNum) {
this.goodsNum = goodsNum;
}
public String toString() {
return this.getName() + "\t" + this.getPrice() + "元/天\t载货:" + goodsNum + "吨";
}
}租赁类
import java.util.Scanner;
public class Lease {
public static void main(String[] args) {
System.out.println("-----欢迎使用答答租车系统-----\n 您是否要租车：1是\t0否");
int finalPrice = 0; // 最终的价格
int finalPerson = 0; // 最终的载客数
int finalGoods = 0; // 最终的载物量
StringBuffer buf_busName = new StringBuffer();
StringBuffer buf_trunkName = new StringBuffer();
Scanner in = new Scanner(System.in);
if (in.nextInt() != 1) {
System.out.println("谢谢惠顾，欢迎下次再来。");
in.close();
return ;
}
System.out.println("您可租车的类型及其价目表：\n序号\t汽车名称\t租金\t容量");
Bus car1 = new Bus("奥迪A4",500,4); //实例化奥迪A4
Bus car2 = new Bus("马自达6",400,4); //实例化马自达6
Bus car3 = new Bus("金龙",800,20); //实例化金龙
Trunk car4 = new Trunk("松花江",400,4); //实例化松花江
Trunk car5 = new Trunk("依维柯",1000,20); //实例化依维柯
Pickup car6 = new Pickup("皮卡雪6",450,4,2); //实例化皮卡雪6
Car[] cars = {car1,car2,car3,car4,car5,car6};
/*展示车辆信息*/
for(int i = 0; i < cars.length; i++){
System.out.println((i + 1) + ".\t" + cars[i].toString());
}
System.out.println("请输入您要租汽车的数量：");
int num = in.nextInt(); //记录租车数量
int[] car = new int[num]; //记录租车序号
for(int i = 0; i < num; i++){
System.out.println("请输入第" + (i + 1) + "辆车的序号：");
int key = in.nextInt();
if(key >=1 && key <= 6){
car[i] = key;
}else{
System.out.println("您输入的序列有误，请重新输入(1-6):");
i--; //输入错误，重新输入
}
}
for (int i = 0; i < car.length; i ++) {
switch (car[i]) {
case 1:
buf_busName.append(car1.getName()+" ");
finalPrice += car1.getPrice();
finalPerson += car1.getCapcity();
break;
case 2:
buf_busName.append(car2.getName()+" ");
finalPrice += car2.getPrice();
finalPerson += car2.getCapcity();
break;
case 3:
buf_busName.append(car3.getName()+" ");
finalPrice += car3.getPrice();
finalPerson += car3.getCapcity();
break;
case 4:
buf_trunkName.append(car4.getName()+" ");
finalPrice += car4.getPrice();
finalGoods += car4.getGoodsNum();
break;
case 5:
buf_trunkName.append(car5.getName()+" ");
finalPrice += car5.getPrice();
finalGoods += car5.getGoodsNum();
break;
case 6:
buf_busName.append(car6.getName()+" ");
buf_trunkName.append(car6.getName()+" ");
finalPrice += car6.getPrice();
finalPerson += car6.getPersonNum();
finalGoods += car6.getGoodsNum();
break;
default:
break;
}
}
System.out.println("请输入租车天数：");
int days = in.nextInt();
//最终信息输出
System.out.println("您的账单：\n***可载人的车有：");
System.out.println(buf_busName + "共载人：" + finalPerson + "人");
System.out.println("***载货的车有：\n" + buf_trunkName + "共载货：" + finalGoods + "吨");
System.out.println("***租车总价格：" + finalPrice * days);
System.out.println("感谢使用答答租车系统");
in.close(); //关闭用户输入
}
}运行效果：
