業務：計算價格、計算載人量、計算載貨量；
代碼實現：Calc接口、Car類、各種車型類繼承Car類
接口Calc：
package com.dadataxi;
public interface Calc {
public double calcPrice(int days,int num);
public int calcPersons(int num);
public double calcGoods(int num);
}Car類，实现接口calc;
package com.dadataxi;
public class Car implements Calc{
public String name; //车名
public double price;//租车价格
public int persons;//载客量
public double goods;//载货量
public boolean isPerson;//是否可载人
public boolean isGood;//是否可载货
/**
* @param days 租车天数
* @param num 租车数量
* @return double类型 某种类型车租车总价
*/
@Override
public double calcPrice(int days,int num) {
// TODO Auto-generated method stub
return price*days*num;
}
/**
* @param num 租车数量
* @return int类型 某种类型车可乘坐人数
*/
@Override
public int calcPersons(int num) {
// TODO Auto-generated method stub
return persons*num;
}
/**
* @param num 租车数量
* @return int类型 某种类型车可载货量
*/
@Override
public double calcGoods(int num) {
// TODO Auto-generated method stub
return goods*num;
}
}
载人车辆：
package com.dadataxi;
public class PersonCar extends Car{
//使用构造函数初始化车辆属性
public PersonCar(String name,double price,int persons) {
this.name = name;
this.price = price;
this.persons = persons;
this.isPerson = true;
}
//使用toString方法输出
public String toString() {
return name+"\t"+price+"\\天"+"\t"+"载人："+persons+"人";
}
}皮卡车型：
package com.dadataxi;
public class PiKa extends Car {
//使用构造函数初始化车辆属性
public PiKa(String name,double price,int persons,double goods) {
this.name = name;
this.price = price;
this.persons = persons;
this.isPerson = true;
this.isGood = true;
this.goods = goods;
}
//使用toString方法输出
public String toString() {
return name+"\t"+price+"\\天"+"\t"+"载人："+persons+"人"+"载货："+goods+"吨";
}
}货车类
package com.dadataxi;
public class HuoChe extends Car{
//使用构造函数初始化车辆属性
public HuoChe(String name,double price,double goods) {
this.name = name;
this.price = price;
this.goods = goods;
this.isGood = true;
}
//使用toString方法输出
public String toString() {
return name+"\t"+price+"\\天"+"\t"+"载货："+goods+"吨";
}
}主函数
package com.dadataxi;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;
public class UserInter {
public static void main(String[] args) {
// TODO Auto-generated method stub
double totalPrice = 0;//订单总价格
int totalPersons = 0;//订单总可坐人数
double totalGoods = 0;//订单总可载货量
Set<String> carPersons = new HashSet<String>();//存储载人车辆
Set<String> carGoods = new HashSet<String>();//存储载货车辆
Car cars[] = { new PersonCar("奥迪A4", 500.0, 4), new PiKa("皮卡", 200, 2, 1.2),
new HuoChe("东风大货", 1000, 20) };//引用Car类型数组变量存储车辆
//用户交互代码
//获取用户输入
Scanner in = new Scanner(System.in);
System.out.println("--------欢迎使用答答租车系统--------");
System.out.println("您是否要租车：1 是，2 否");
String result = in.next();
if (result.equals("1")) {
System.out.println("序号" + "\t" + "汽车名称" + "\t" + "租金" + "\t" + "容量" + "\t");
for (int i = 0; i < cars.length; i++) {
System.out.println((i + 1) + "." + "\t" + cars[i]);
}
int flag = 1;
String res1 = "1";
do {
if (res1.equals("1")) {
System.out.println("请输入要租车的车型");
int xuHao = in.nextInt();
System.out.println("请输入要租车的天数");
int days = in.nextInt();
System.out.println("请输入要租车的数量");
int num = in.nextInt();
totalPrice += cars[xuHao - 1].calcPrice(days, num);
if (cars[xuHao - 1].isGood) {
carGoods.add(cars[xuHao - 1].name);
totalGoods += cars[xuHao - 1].calcGoods(num);
}
if (cars[xuHao - 1].isPerson) {
carPersons.add(cars[xuHao - 1].name);
totalPersons += cars[xuHao - 1].calcPersons(num);
}
System.out.println("您是否继续租车：1 是 0 否");
res1 = in.next();
} else if (res1.equals("0")) {
System.out.println("退出答答租车系统");
flag = 0;
} else {
System.out.println("请输入正确的指令");
}
} while (flag == 1);
System.out.println("--------您的账单：--------");
if (carPersons.size() > 0) {
System.out.println("---可载人车辆有：---");
for (String name : carPersons) {
System.out.print(name + "\t");
}
System.out.print(totalPersons + "人" + "\n");
}
if (carGoods.size() > 0) {
System.out.println("---可载货车辆有：---");
for (String name : carGoods) {
System.out.print(name + "\t");
}
System.out.print(totalGoods + "吨" + "\n");
}
System.out.println("---您的租车总价格：" + totalPrice + "元");
} else if (result.equals("2")) {
System.out.println("退出答答租车系统");
System.exit(0);
} else {
System.out.println("请输入正确的指令");
}
}
}有问题请多多指教
随时随地看视频
