1 package com.lease;
2 /**
3 * 汽车类
4 * @author Administrator
5 * 2019-01-15
6 */
7 public abstract class Car {
8 private String type; //汽车类型
9 //private double rent; //日租金
10
11 public Car() { //空参构造
12 super();
13 }
14
15 public Car(String type) { //带参构造
16 super();
17 this.type = type;
18 }
19
20 public String getType() { //get方法
21 return type;
22 }
23 public void setType(String type) { //set方法
24 this.type = type;
25 }
26
27 //租车方法
28 public abstract void lease(String type, String model,int days,double sumRent,int seat);
29
30 public abstract double discount(int days,double rent); //打折方法
31 }
1 package com.lease;
2 /**
3 * 轿车类
4 * @author Administrator
5 * 2019-01-15
6 */
7 public class Sedan extends Car {
8 private String model; //轿车型号
9 private String carno; //车牌
10 private double rent; //日租金
11
12 public Sedan() {
13 super();
14
15 }
16 //带参构造
17 public Sedan(String type, String model) {
18 super();
19 this.model = model;
20 if("别克".equals(type)) { //判断类型
21 if("GL8".equals(model)) { //判断型号
22 rent = 600; //日租金
23 carno = "京NT96968"; //车牌
24 }else {
25 rent = 300;
26 carno = "京NT96968";
27 }
28 }else {
29 if("X6".equals(model)) {
30 rent = 800;
31 carno = "京NT98568";
32 }else {
33 rent = 600;
34 carno = "京NT99548";
35 }
36 }
37
38 }
39
40 /**
41 * gei，set方法
42 */
43 public double getRent() {
44 return rent;
45 }
46 public void setRent(double rent) {
47 this.rent = rent;
48 }
49 public String getModel() {
50 return model;
51 }
52 public void setModel(String model) {
53 this.model = model;
54 }
55 //打折方法并计算租金总额
56 public double discount(int days,double rent) {
57 double sumRent;
58 if(days>150) {
59 sumRent = rent*days*0.7;
60 }else if(days>30){
61 sumRent = rent*days*0.8;
62 }else if(days>7){
63 sumRent = rent*days*0.9;
64 }else {
65 sumRent = rent*days;
66 }
67 return sumRent;
68 }
69 //租车方法，并输出您租车的信息
70 public void lease(String type, String model,int days,double sumRent,int seat) {
71 System.out.println("您租赁的是：" + type +model);
72 System.out.println("您租赁的天数是：" + days + "天");
73 System.out.println("您的车牌是：" + this.carno);
74 System.out.println("您租赁的总价格是：" + sumRent + "元");
75
76 }
77
78
79
80 }
1 package com.lease;
2 /**
3 * 客车类
4 * @author Administrator
5 * 2019-01-15
6 */
7 public class Bus extends Car {
8 private int seat; //客车座位
9 private String carno; //车牌
10 private double rent; //日租金
11
12 public Bus() {
13 super();
14 }
15
16 public Bus(String type, int seat) {
17 super();
18 this.seat = seat;
19 if(seat==16) { //判断座位数
20 rent = 800; //日租金
21 if("金龙".equals(type)) { //判断类型
22 carno = "京NU5968"; //车牌
23 }else {
24 carno = "京NB95468";
25 }
26
27 }else {
28 rent = 1600;
29 if("金龙".equals(type)) {
30 carno = "京NB11012";
31 }else {
32 carno = "京NB91110";
33 };
34 }
35 }
36 /**
37 * gei，set方法
38 */
39 public int getSeat() {
40 return seat;
41 }
42 public void setSeat(int seat) {
43 this.seat = seat;
44 }
45 public double getRent() {
46 return rent;
47 }
48 public void setRent(double rent) {
49 this.rent = rent;
50 }
51 public int getModel() {
52 return seat;
53 }
54 public void setModel(int sent) {
55 this.seat = sent;
56 }
57 //打折方法并计算租金总额
58 public double discount(int days,double rent) {
59 double sumRent;
60 if(days>=150) {
61 sumRent = rent*days*0.6;
62 }else if(days>30){
63 sumRent = rent*days*0.8;
64 }else if(days>7){
65 sumRent = rent*days*0.9;
66 }else {
67 sumRent = rent*days;
68 }
69 return sumRent;
70 }
71 @Override//租车方法，并输出您租车的信息
72 public void lease(String type, String model, int days, double sumRent,int seat) {
73 System.out.println("您租赁的是：" + type + seat + "座");
74 System.out.println("您租赁的天数是：" + days + "天");
75 System.out.println("您的车牌是：" + this.carno);
76 System.out.println("您租赁的总价格是：" + sumRent + "元");
77 }
78 }
package com.demo;
import java.util.Scanner;
import com.lease.Bus;
import com.lease.Car;
import com.lease.Sedan;
public class CarDemo {
public static void main(String[] args) {
Car car;
String model;
int seat;
int days;
Scanner sc =new Scanner(System.in);
System.out.println("*****欢迎来到租车系统 *****");
System.out.println("1、轿车\t2、客车");
System.out.println("请输入选择的序号：");
int choose =sc.nextInt();
if(choose==1) {
System.out.println("1、宝马\t2、别克");
System.out.println("请输入选择的序号：");
choose = sc.nextInt();
String type = choose == 1? "宝马":"别克"; //选择的类型
if(choose == 1){
System.out.println("1、X6\t2、550i");
System.out.println("请输入选择的序号：");
choose = sc.nextInt();
model = choose == 1? "X6":"550i"; //选择的型号
}else {
System.out.println("1、林荫大道\t2、GL8");
System.out.println("请输入选择的序号：");
choose = sc.nextInt();
model = choose == 1? "林荫大道":"GL8"; //选择的型号
}
System.out.println("请输入您要租赁的天数：");
days = sc.nextInt();
car = new Sedan(type,model); //Sedan类用带参构造创建对象
Sedan s = (Sedan)car;
//调用租赁方法
s.lease(type, model, days,
s.discount(days, s.getRent())/*调用discount方法得到总金额*/, 0);
}else {
System.out.println("1、金杯\t2、金龙");
System.out.println("请输入选择的序号：");
choose = sc.nextInt();
String type = choose == 1? "金杯":"金龙"; //选择的类型
System.out.println("1、16\t2、24");
System.out.println("请输入选择的序号：");
choose = sc.nextInt();
seat = choose == 1? 16:24; //选择座位数
System.out.println("请输入您要租赁的天数：");
days = sc.nextInt();
car = new Bus(type,seat); //Bus类 带参构造 创建对象
//调用租赁方法
Bus bus = (Bus)car;
bus.lease(type, null, days, bus.discount(days, bus.getRent()), seat);
}
}
}
运行结果：
来源：https://www.cnblogs.com/fanxinmu/p/10362818.html