java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 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 inherit;

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 double getSalary(int month) {
        return 0;
    }

}

package inherit;

public class SalariedEmployee extends ColaEmployee {
    protected double money;

    public SalariedEmployee() {
        super();
    }

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

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

}

package inherit;

public class HourlyEmployee extends ColaEmployee {
    protected int hourmoney;
    protected int daymonth;

    public HourlyEmployee() {
        super();
    }

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

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

}

package inherit;

public class SalesEmployee extends ColaEmployee {
    protected int monthsales;
    protected double rate;

    public SalesEmployee() {
        super();
    }

    public SalesEmployee(String name, int month, int monthsales, double rate) {
        super(name, month);
        this.monthsales = monthsales;
        this.rate = rate;
    }

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

}

package inherit;

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 inherit;

public class TestCompany {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ColaEmployee c1[] = { new SalariedEmployee("salarE", 8, 20000),
                new HourlyEmployee("hourlyE", 4, 100, 200),
                new SalesEmployee("salesE", 5, 300000, 0.5) };
        for (int i = 0; i < c1.length; i++) {
            new Company().getSalary(c1[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 inherit;

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 inherit;

import java.util.Scanner;

public class Gardener {
    public static void main(String[] args) {

        Gardener y = new Gardener();
        y.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;
    }

}