JAVA15

Cola公司的雇员分为以下若干类:(知识点:多态) [必做
题]
• 4.1 ColaEmployee :这是所有员工总的父类,属性:员工的
姓名,员工的生日月份。方法:getSalary(int month) 根据参数
月份来确定工资,如果该月员工过生日,则公司会额外奖励
100 元。

• 4.2 SalariedEmployee : ColaEmployee 的子类,拿固定工
资的员工。属性:月薪
课后作业

• 4.3 HourlyEmployee :ColaEmployee 的子类,按小时拿工
资的员工,每月工作超出160 小时的部分按照1.5 倍工资发
放。属性:每小时的工资、每月工作的小时数

• 4.4 SalesEmployee :ColaEmployee 的子类,销售人员,
工资由月销售额和提成率决定。属性:月销售额、提成率

• 4.5 定义一个类Company,在该类中写一个方法,调用该
方法可以打印出某月某个员工的工资数额,写一个测试类
TestCompany,在main方法,把若干各种类型的员工放在一
个ColaEmployee 数组里,并单元出数组中每个员工当月的
工资。

 1 package G2;
 2 
 3 public class Colaemployee {
 4      protected String name;
 5         protected int month;
 6 
 7         public void ColaEmployee() {
 8          
 9         }
10 
11         public void ColaEmployee(String name, int month) {
12             
13             this.name = name;
14             this.month = month;
15         }
16 
17         public String getName() {
18             return name;
19         }
20 
21         public void setName(String name) {
22             this.name = name;
23         }
24 
25         public int getMonth() {
26             return month;
27         }
28 
29         public void setMonth(int month) {
30             this.month = month;
31         }
32 
33         public double getSalary(int month) {
34             return 0;
35         }
36     }
1 package G2;
2 
3 public class company {
4         public void getSalary(Colaemployee c, int month) {
5             System.out.println(c.name + "在" + month + "月的月薪为" + c.getSalary(month) + "元");
6         }
7     }
 1 package G2;
 2 
 3 public class HourlyEmployee extends Colaemployee {
 4     protected int hour;
 5     protected int hoursalary;
 6 
 7     public HourlyEmployee() {
 8         super();
 9     }
10 
11     public HourlyEmployee(String name, int month, int hour, int hoursalary) {
12         super();
13         this.hour = hour;
14         this.hoursalary = hoursalary;
15     }
16 
17     public double getSalary(int month) {
18         if (super.month == month) {
19             if (hour > 160) {
20                 return hoursalary * 160 + hoursalary * (hour - 160) * 1.5 + 100;
21             } else {
22                 return hoursalary * hour + 100;
23             }
24         } else {
25             if (hour > 160) {
26                 return hoursalary * 160 + hoursalary * (hour - 160) * 1.5;
27             } else {
28                 return hoursalary * hour;
29             }
30         }
31     }
32 
33 }
 1 package G2;
 2 
 3 public class SalariedEmployee extends Colaemployee {
 4     private double salary;
 5 
 6     public SalariedEmployee(double salary) {
 7         super();
 8         this.salary = salary;
 9     }
10 
11     public SalariedEmployee(String name, int month, double salary) {
12         super();
13         this.salary = salary;
14     }
15 
16     public double getSalary(int month) {
17         if (super.month == month) {
18             return month + 100;
19         } else {
20             return salary;
21         }
22     }
23 }
 1 package G2;
 2 
 3 public class SalesEmployee extends Colaemployee {
 4     protected int yuexiaoshou;
 5     protected double tuchenglv;
 6 
 7     public SalesEmployee() {
 8         super();
 9     }
10 
11     public SalesEmployee(String name, int month, int yuexiaoshou, double tuchenglv) {
12         super();
13         this.yuexiaoshou = yuexiaoshou;
14         this.tuchenglv = tuchenglv;
15     }
16 
17     public double getSalary(int month) {
18         if (super.month == month) {
19             return yuexiaoshou * tuchenglv + 100;
20         } else {
21             return yuexiaoshou * tuchenglv;
22         }
23     }
24 }
 1 package G2;
 2 
 3 public class testCompany {
 4 
 5     public static void main(String[] args) {
 6         // TODO Auto-generated method stub
 7        
 8             // TODO Auto-generated method stub
 9             Colaemployee c1[] = { new SalariedEmployee("a", 11, 20000), new HourlyEmployee("b", 6, 200, 200),
10                     new SalesEmployee("c", 5, 330000, 0.5) };
11             for (int i = 0; i < c1.length; i++) {
12                 new company().getSalary(c1[i], 5);
13             }
14         }
15 
16     
17     }

 5、利用接口实现动态的创建对象[选做题]
• 5.1 创建4个类:
• 苹果
• 香蕉
• 葡萄
• 园丁
• 5.2 在三种水果的构造方法中打印一句话.
• 以苹果类为例
• class apple
• {
• public apple()
• {
• System.out.println(―创建了一个苹果类的对象‖);
}
• }
课后作业
• 类图如下:
• 5.3 要求从控制台输入一个字符串,根据字符串的
值来判断创建三种水果中哪个类的对象

 1 package G3;
 2 
 3 public interface Fruit {
 4 
 5 }
 6 class Apple implements Fruit {
 7     public Apple() {
 8         System.out.println("创建了一个苹果类的对象");
 9     }
10 }
11 
12 class Banana implements Fruit {
13     public Banana() {
14         System.out.println("创建了一个香蕉类的对象");
15     }
16 }
17 
18 class Grape implements Fruit {
19     public Grape() {
20         System.out.println("创建了一个葡萄类的对象");
21     }
22 }
 1 package G3;
 2 import java.util.Scanner;
 3 public class Gardener {
 4     public static void main(String[] args) {
 5         // TODO Auto-generated method stub
 6         Gardener g = new Gardener();
 7         g.create();
 8     }
 9 
10     public Fruit create() {
11         Scanner input = new Scanner(System.in);
12         String name = input.next();
13         Fruit f = null;
14         if (name.equals("苹果")) {
15             f = new Apple();
16         }
17         if (name.equals("香蕉")) {
18             f = new Banana();
19         }
20         if (name.equals("葡萄")) {
21             f = new Grape();
22         }
23         return f;
24     }
25 }

JAVA15

上一篇:Java15的安装与环境变量的配置


下一篇:Java15变量竟然没什么区别,八大基本数据类型你知道吗?