第十五周上机课作业

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。
课后作业

package gkd;

public abstract class ColaEmployee {
    private String name;
    private int month;
    public ColaEmployee(){
        
    }
    public ColaEmployee(String name, int month) {
        super();
        this.name = name;
        this.month = month;
    }
    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;
    }
    public abstract double getSalary(int month);
    
    
}

package gkd;

public class Company {
    public static void print(ColaEmployee[] colaEmployees){
        int month = 1;
        for (int i = 0; i < colaEmployees.length; i++) {
            System.out.println("工資是"+colaEmployees[i].getSalary(month));
        }
        
    }
}

package gkd;

public class HourlyEmployee extends ColaEmployee{    
    private double hourMoney;
    private int hour;
    public HourlyEmployee() {
        super();
    }
    
    public HourlyEmployee(String name, int month, double hourMoney, int hour) {
        super(name, month);
        this.hourMoney = hourMoney;
        this.hour = hour;
    }

    public double getHourMoney() {
        return hourMoney;
    }
    public void setHourMoney(double hourMoney) {
        this.hourMoney = hourMoney;
    }
    public int getHour() {
        return hour;
    }
    public void setHour(int hour) {
        this.hour = hour;
    }
    public double getSalary(int month){
        if (super.getMonth() == month) {
            return (this.hour > 160 ? this.hourMoney * this.hour + ((this.hour - 160) * this.hourMoney * 0.5) :
                this.hour * this.hourMoney) + 100;
        }
        return this.hour > 160 ? this.hourMoney * this.hour + ((this.hour - 160) * this.hourMoney * 0.5) :
            this.hour * this.hourMoney;
    } 

}

package gkd;

public class SalariedEmployee extends ColaEmployee{
    private double monthMoney;

    public SalariedEmployee() {
        super();
    }


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


    public double getMonthMoney() {
        return monthMoney;
    }

    public void setMonthMoney(double monthMoney) {
        this.monthMoney = monthMoney;
    }
    public  double getSalary(int month){
        if (super.getMonth() == month) {
            return this.monthMoney + 100;
        }
        return this.monthMoney;
        
    }
}

package gkd;

public class SalesEmployee extends ColaEmployee{
    private double monthlySales;
    private double rate;
    public SalesEmployee() {
        super();
    }
    public SalesEmployee(String name, int month, double monthlySales,
            double rate) {
        super(name, month);
        this.monthlySales = monthlySales;
        this.rate = rate;
    }
    public double getMonthlySales() {
        return monthlySales;
    }
    public void setMonthlySales(double monthlySales) {
        this.monthlySales = monthlySales;
    }
    public double getRate() {
        return rate;
    }
    public void setRate(double rate) {
        this.rate = rate;
    }
    public double getSalary(int month){
        if (super.getMonth() == month) {
            return this.monthlySales * this.rate + 100;
        }
        return this.monthlySales * this.rate;
    }
}

package gkd;

public class Test {
    public static void main(String[] args) {
        ColaEmployee hourlyEmployee = new HourlyEmployee("張三", 6, 45, 180);
        ColaEmployee salariedEmployee = new SalariedEmployee("李四", 3, 9000);
        ColaEmployee salesEmployee = new SalesEmployee("王五", 7, 500000, 0.03);
        ColaEmployee[] colaEmployees = new ColaEmployee[]{hourlyEmployee, salariedEmployee, salesEmployee};
        Company.print(colaEmployees);
    }
}

 

 

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‖);

　　}

}

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 gkd2;

public class Apple implements Fruit{
    public Apple() {
        System.out.println("创建了苹果的对象");
    }
}

package gkd2;

public interface Fruit {

}

package gkd2;

import java.util.Scanner;

public class Gardener {
    public void create(String fruit){
        if("apple".equals(fruit)) {
            Fruit apple = new Apple();
        }else if("oranges".equals(fruit)) {
            Fruit oranges = new Oranges();
        }else if("pear".equals(fruit)) {
            Fruit pear = new Pear();
        }
      }
    public static void main(String[] args) {
         Gardener gardener = new Gardener();
         Scanner s = new Scanner(System.in);
             System.out.println("请输入想要创造的水果");
             gardener.create(s.next());
             
     }

 }

package gkd2;

public class Oranges implements Fruit{
    public Oranges() {
        System.out.println("创建橘子的对象");
    }
}

package gkd2;

public class Pear implements Fruit{
    public Pear() {
        System.out.println("创建梨的对象");
    }
}