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 abc;

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);
            }

        }
}

package abc;

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 abc;

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 abc;

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 abc;

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 abc;

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;
        }
}

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 suiguo;

public interface Fruit {

}
class Apple implements Fruit{
    public Apple(){
        System.out.println("创建了一个苹果类的对象");
    }
}
    class Banana implements Fruit{
        public Banana(){
            System.out.println("创建了一个香蕉类的对象");
        }
    }
    
    class Grape implements Fruit{
        public Grape(){
            System.out.println("创建了一个葡萄类的对象");
        }
    }

package suiguo;
import java.applet.Applet;
import java.util.Scanner;

public class Gardener {

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

    }
    public Fruit create(){
        Scanner input=new Scanner(System.in);
        String name=input.next();
        Fruit f=null;
        if(name.equals("苹果")){
            f=new Apple();
        }
        if(name.equals("香蕉")){
            f=new Banana();
        }
        if(name.equals("葡萄")){
            f=new Grape();
        }
        return f;
    }

}