第十五周上机作业

1.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 nj666;
public class ColaEmployee {
    
        protected String name;
        protected int month;

        public double getSalary(int month) {
            return 0;

        }

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

        public ColaEmployee() {
            super();
        }

        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;
        }

}

package nj666;

public class SalariedEmployee extends ColaEmployee {
    
    protected double yuexin;

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

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

}

package nj666;

public class HourlyEmployee extends ColaEmployee {
    
    protected int gongzi;
    protected int xiaoshishu;

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

    public HourlyEmployee() {
        super();
    }

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

}

package nj666;

public class SalesEmployee extends ColaEmployee {
    
    protected int mxiaoshoue;
    protected double tichenglv;

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

    public SalesEmployee() {
        super();
    }

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

}

package nj666;

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 nj666;

public class TestCompany {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        
        ColaEmployee c1[] = { new SalariedEmployee("NN", 6, 8900),
                new HourlyEmployee("XX", 6, 15, 560),
                new SalesEmployee("LL", 3, 6400, 9.0) };
        for (int i = 0; i < c1.length; i++) {
            new Company().getSalary(c1[i], 9);

        }

    }

}

2.• 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 nj666;

import java.util.Scanner;

public interface Fruit {
}

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

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

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

class Gardener {
    public Fruit create() {
        Fruit f = null;
        Scanner input = new Scanner(System.in);
        String name = input.next();
        if (name.equals("apple")) {
            f = new Apple();
        } else if (name.equals("banana")) {
            f = new Banana();
        } else if (name.equals("grape")) {
            f = new Grape();
        } else {
            System.out.println("no");
        }
        return f;

    }

}

package nj666;

public class t3 {

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

        Gardener g = new Gardener();
        g.create();
    }

}