第十五次作业

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。

package aa;

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 aa;

public class ColaEmployee {
    protected String name;
    protected int month;
    public ColaEmployee() {
        super();
    }
    public ColaEmployee(String name, int month) {
        super();
        this.name = name;
        this.month = month;
    }
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getMonth() {
        return month;
    }
    public void setMonth(int month) {
        this.month = month;
    }
    public double getSalary(int month){
        return 0;
    }
}

package aa;

public class HourlyEmployee extends ColaEmployee {
    protected int hour;
       protected int hoursalary;

       public HourlyEmployee() {
           super();
       }

       public HourlyEmployee(String name, int month, int hour, int hoursalary) {
           super(name, month);
           this.hour = hour;
           this.hoursalary = hoursalary;
       }

       public double getSalary(int month) {
           if (super.month == month) {
               if (hour > 160) {
                   return hoursalary * 160 + hoursalary * (hour - 160) * 1.5 + 100;
               } else {
                   return hoursalary * hour + 100;
               }
           } else {
               if (hour > 160) {
                   return hoursalary * 160 + hoursalary * (hour - 160) * 1.5;
               } else {
                   return hoursalary * hour;
               }
           }
       }

}

package aa;

public class SalariedEmployee extends ColaEmployee {
    private double salary;

       public SalariedEmployee(double salary) {
           super();
           this.salary = salary;
       }

       public SalariedEmployee(String name, int month, double salary) {
           super(name, month);
           this.salary = salary;
       }

       public double getSalary(int month) {
           if (super.month == month) {
               return month + 100;
           } else {
               return salary;
           }
       }
}

package aa;

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

package aa;

public class TestCompany {
      public static void main(String[] args) {
          // TODO Auto-generated method stub
          ColaEmployee c1[] = { new SalariedEmployee("a", 11, 20000),
                  new HourlyEmployee("b", 6, 200, 200),
                  new SalesEmployee("c", 5, 330000, 0.5) };
          for (int i = 0; i < c1.length; i++) {
              new Company().getSalary(c1[i], 5);
          }

      }
}

 

 

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：

 

package aa;
import java.util.Scanner;
public 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;

        }
        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");
            }
        }

    }

package aa;

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

    }
}