第15周上机作业

课后作业

 

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 zy;

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 zy;

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 zy;

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 zy;

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 zy;

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 zy;

public class Testcompany {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        Colaemployee c1[] = { new Salariedemployee("yy", 3, 8000),
                new Hourlyemployee("dd",8, 16, 184),
                new Salesemployee("ff", 7, 7564, 2) };
        for (int i = 0; i < c1.length; i++) {
            new Company().getSalary(c1[i], 12);

        }
    }

}

• 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

 

 

package zy;
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 Putao implements Fruit {
         public Putao() {
             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("A")) {
                 f = new Apple();
             } else if (name.equals("B")) {
                 f = new Banana();
             } else if (name.equals("G")) {
                 f = new Putao();
             } else {
                System.out.println("不会种");
             }
             return f;
         }

}

package zy;

public class t3 {

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

}