第十五周作业

4、 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
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 oop;

public abstract class ColaEmployee {
    String Ename;
    int Emonth;
    public abstract double getSalary(int month);
    public String getEname() {
        return Ename;
    }
    public void setEname(String ename) {
        Ename = ename;
    }
    public int getEmonth() {
        return Emonth;
    }
    public void setEmonth(int emonth) {
        Emonth = emonth;
    }
    public ColaEmployee(String ename, int emonth) {
        super();
        Ename = ename;
        Emonth = emonth;
    }
    
}

　　

package oop;

public class SalariedEmployee extends ColaEmployee{


    double MSalary;

    public SalariedEmployee(String ename, int emonth, double mSalary) {
        super(ename, emonth);
        MSalary = mSalary;
    }

    @Override
    public double getSalary(int month) {
        // TODO Auto-generated method stub
        if(month==super.Emonth){
            return (MSalary+100);
        }else{
            return MSalary;
        }
    }
    
}

　　

public class HourlyEmployee extends ColaEmployee{

    double HSalary;
    double MHour;
    
    public HourlyEmployee(String ename, int emonth, double hSalary, double mHour) {
        super(ename, emonth);
        HSalary = hSalary;
        MHour = mHour;
    }

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

　　

public class SalesEmployee extends ColaEmployee{
    
    double MNum;
    double TiChengLv;
    
    public SalesEmployee(String ename, int emonth, double mNum, double tiChengLv) {
        super(ename, emonth);
        MNum = mNum;
        TiChengLv = tiChengLv;
    }

    public double getSalary(int month){
        if(super.Emonth==month){
            return MNum*TiChengLv+100;
        }else{
            return MNum*TiChengLv;
        }
    }
}

　　

package oop;

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

　　

public class TestCompany {

    /**
     * @param args
     */
    public static void main(String[] args) {
        ColaEmployee c[] = { new SalariedEmployee("小刘", 1, 1000),
                new HourlyEmployee("小金", 8, 110, 100),
                new SalesEmployee("小仙", 2, 30000, 0.56) };
        for (int i = 0; i < c.length; i++) {
            new Company().getSalary(c[i], 1);
        }
}

}

 

 

 

 

 

 • 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

 

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();
    }

}

　　

 

 

 

public class TestCompany {

    /**
     * @param args
     */
    public static void main(String[] args) {
        ColaEmployee c[] = { new SalariedEmployee("小刘", 1, 1000),
                new HourlyEmployee("小金", 8, 110, 100),
                new SalesEmployee("小仙", 2, 30000, 0.56) };
        for (int i = 0; i < c.length; i++) {
            new Company().getSalary(c[i], 1);
        }
    }
}