第十五周作业

Posted 2021-06-18 刘德广

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 Homwork3;

public class ColaEmployee {
    protected String name;
    protected int month;
     
  public ColaEmployee() {
      super();
  }
  public double getSalary(int month) {
      return 0;

  }
  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;
  }
     

}


____________________________________________________________


package Homwork3;

public class SalariedEmployee extends ColaEmployee{
    protected double yuexin;

   public SalariedEmployee() {
       super();
   }

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

____________________________________________________________


package Homwork3;

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

____________________________________________________________


package Homwork3;

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


____________________________________________________________


package Homwork3;

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



____________________________________________________________


package Homwork3;

public class Test {
     
   
    public static void main(String[] args) {
       
          ColaEmployee a1[] = { new SalariedEmployee("张明", 3, 10000),
                  new HourlyEmployee("李四", 6, 6, 1200),
                    new SalesEmployee("张三", 9, 1600, 9.0) };
            for (int i = 0; i < a1.length; i++) {
                new Company().getSalary(a1[i],8);
           
                   
           
          }
    }
 
}

 

 

• 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：
• 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

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 Grape implements Fruit {
    public Grape() {
        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 Grape();
        } else {
            System.out.println("no");
        }
        return f;
 
    }
}

public class TestFruit {
 
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Gardener g = new Gardener();
        g.create();
    }
 
}