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 ywsl;

public class ColaEmployee {
    String name;
    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 ywsl;

public class SalariedEmployee extends ColaEmployee {
    double wage;

    public SalariedEmployee() {
        super();
    }

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

package ywsl;

public class HourlyEmployee extends ColaEmployee {
    int hourwage;
    int monthhour;
    
    public HourlyEmployee() {
        super();
    }

    public HourlyEmployee(String name, int month, int hourwage, int monthhour) {
        super(name, month);
        this.hourwage = hourwage;
        this.monthhour = monthhour;
    }
    public double getSalary(int month) {
        if (super.month == month) {
            if (monthhour > 160) {
                return hourwage * 160 + hourwage * (monthhour - 160) * 1.5
                        + 100;
            } else {
                return hourwage * monthhour + 100;
            }
        } else {
            if (monthhour > 160) {
                return hourwage * 160 + hourwage * (monthhour - 160) * 1.5;
            } else {
                return hourwage * monthhour;
            }
        }
    }

}

package ywsl;

public class SalesEmployee extends ColaEmployee {
    int monthsales;
    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 ywsl;

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 ywsl;

public class TestCompany {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         ColaEmployee c1[] = { new SalariedEmployee("WM", 12, 6000),
                    new HourlyEmployee("YW",12, 15, 196),
                    new SalesEmployee("SL", 12, 520, 5) };
            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 ywsl;

import java.util.Scanner;

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");
    }
}

class Gardener {
    public Fruit create() {
        Scanner input = new Scanner(System.in);
        String name = input.next();
        
        Fruit fruit = null;
        if (name.equals("苹果")) {
            fruit = new Apple();
        } 
        else if (name.equals("香蕉")) {
            fruit = new Banana();
        } 
        else if (name.equals("葡萄")) {
            fruit = new Grape();
        } 
        else {
           System.out.println("其他水果");
        }
        return fruit;
    }
}

package ywsl;

public class test {

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

    }

}