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 }
原文：https://www.cnblogs.com/gxl920/p/14900888.html