java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 hongxu;

public class ColaEmployee {
    String name;
    int month;

    public ColaEmployee() {

    }

    public ColaEmployee(String name, int month) {
        this.name = name;
        this.month = month;
    }

    public double getSalary(int month) {
        return 0;
    }

}

package hongxu;

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 hongxu;

public class HourlyEmployee extends ColaEmployee {
    private int hourSalary;
    private int hourNum;

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

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

    }
}

package hongxu;

public class SalariedEmployee extends ColaEmployee {
    double monSalary;

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

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

    }

}

package hongxu;

public class SalesEmployee extends ColaEmployee {
    private int monthSales;
    private double royaltyRate;

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

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

package hongxu;

public class TestCompany {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ColaEmployee[] cel = {
                new SalariedEmployee("salariedEmployee", 6, 30000),
                new HourlyEmployee("hourlyEmployee", 5, 100, 300),
                new SalesEmployee("salesEmployee", 3, 7000000, 0.3) };
        for (int i = 0; i < cel.length; i++) {
            new Company().getSalary(cel[i], 6);
        }
    }

}

 

 

 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

 5.15.1 创建4个类：

接口

package hongxu;

public interface Fruit {

}

package hongxu;

public class Apple implements Fruit {
    public Apple() {
        System.out.println("创建了一个苹果对象");
    }
}

package hongxu;

public class Banana implements Fruit{
    public Banana() 
    { 
        System.out.println("创建了一个香蕉对象");
    }
}

package hongxu;

public class Grape implements Fruit {
    public Grape() {
        System.out.println("创建了一个葡萄对象");
    }
}

package hongxu;

import java.util.Scanner;
public 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 {
                System.out.println("不会种");
            }
              return fruit;
    }
}

package hongxu;

public class Test {

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

        
    }