第十五次作业

4.Cola公司的雇员分为以下若干类：(知识点：多态)
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
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。

public class ColaEmployee {
    String name;
    int month;
    
    public ColaEmployee() {
    
    }
    
    public ColaEmployee(String name,int month){
        this.name=name;
        this.month=month;
    }
    
    public double getSalary(int month) {
        return 0;
    }
}

public class SalariedEmployee extends ColaEmployee{
    double monSalary;
    
    public SalariedEmployee(String name,int month,double monSalary) {
        super(name,month);
        this.monSalary=monSalary;
    }
    public double getSalary(int month) {
        if (super.month==month) {
            return monSalary +100;
        }else {
            return monSalary;
        }
        
    }
}

public class HourlyEmployee extends ColaEmployee{
     private int hourSalary;
     private int hourNum;
     
     public HourlyEmployee(String name, int month,int hourSalary,int hourNum) {
         super(name,month);
         this.hourSalary=hourSalary;
         this.hourNum=hourNum;
     }     
     public double getSalary(int month) {
        if(super.month==month) {
            if (hourNum>160) {
                return hourSalary*160+hourSalary*(hourNum-160)*1.5+100;
            }else {
                return hourSalary*hourNum+100;
            }
        }else {
            if (hourNum>160) {
                return hourSalary*160+hourSalary*(hourNum-160)*1.5;
            }else {
                return hourSalary*hourNum;
            }
        }
             
     }
     
}

public class SalesEmployee extends ColaEmployee {
     private int monthSales;
     private double royaltyRate;
     
    public SalesEmployee(String name, int month,int monthSales,double royaltyRate) {
        super(name, month);
        this.monthSales = monthSales;
        this.royaltyRate = royaltyRate;
     }
    public double getSalary(int month) {
        if(super.month == month) {
            return monthSales * royaltyRate + 100;
        }else {
            return monthSales * royaltyRate;
        }
    }
    
}

package aaa;
public class Company {
    
    public void getSalary(ColaEmployee c,int month) {
         System.out.println(c.name + "在" + month + "月的月薪为" + c.getSalary(month)+"元");
    }
}

package aaa;
public class TestCompany {
    public static void main(String[] args) {
        ColaEmployee[] cel = {
                new SalariedEmployee("salariedEmployee", 6, 30000),
                new HourlyEmployee("hourlyEmployee", 5, 100, 300),
                new SalesEmployee("salesEmployee", 3, 7000000, 0.3)
                };
        for (int i = 0; i < cel.length; i++) {
            new Company().getSalary(cel[i],7);
        }
    }
}

 

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‖);
} 
}

类图如下：

package aaa;

import java.util.Scanner;

public interface Fruit {

}
class Apple implements Fruit {
     public Apple() {
        System.out.println("创建了一个苹果对象");
    }
 }
 
 class Banana implements Fruit {
     public Banana() {
        System.out.println("创建了一个香蕉对象");
     }
 }
 
 class Putao implements Fruit {
     public Putao() {
         System.out.println("创建了一个葡萄对象");
     }
 }

 class Gardener {
     public Fruit create() {
         Fruit f = null;
         Scanner input = new Scanner(System.in);
        String name = input.next();
         if (name.equals("苹果")) {
             f = new Apple();
         } else if (name.equals("香蕉")) {
             f = new Banana();
         } else if (name.equals("葡萄")) {
             f = new Putao();
         } else {
            System.out.println("不会种");
         }
         return f;
 
     }
 }

package aaa;

public class Test2 {

     public static void main(String[] args) {
             Gardener g = new Gardener();
                 g.create();
      }
}