第十五周作业
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。
package JavaTest; 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 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 double getSalary(int month){ return 0; } }
4.2 SalariedEmployee : ColaEmployee 的子类,拿固定工
资的员工。属性:月薪
package JavaTest; public class SalariedEmployee extends ColaEmployee{ double monSalary; public SalariedEmployee (){ super(); } public SalariedEmployee(String name,int month,double monSalary){ super(name,month); this.monSalary=monSalary; } public double getSalary(int month){ if(super.getMonth()==month){ return monSalary+100; }else{ return monSalary; } } }
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
package JavaTest; public class HourlyEmployee extends ColaEmployee{ int hourSalary; int hourNum; public HourlyEmployee(){ super(); } public HourlyEmployee(String name,int month,int hourSaraly,int hourNum){ super(name,month); this.hourSalary=hourSaraly; this.hourNum=hourNum; } public double getSalary(int month){ if(super.getMonth()>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; } } } }
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
package JavaTest; public class SalesEmployee extends ColaEmployee{ int monthSales; double royaltyRate; public SalesEmployee(){ super(); } 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.getMonth()==month){ return monthSales * royaltyRate + 100; }else{ return monthSales * royaltyRate; } } }
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 JavaTest; 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"); } }
测试Test
package JavaTest; public class TestCompany { public static void main(String[] args){ ColaEmployee[] cel={ new SalariedEmployee("普通员工",6,5000), new HourlyEmployee("小时工",5,20,300), new SalesEmployee("销售员工",3,50000,0.3), }; for(int i=0;i < cel.length;i++){ new Company().getSalary(cel[i],10); } } }
• 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
接口
package Fruits; public interface Fruits { }
苹果类
package Fruits; public class Apple implements Fruits{ public Apple(){ System.out.println("创建了一个苹果类的对象"); } }
香蕉类
package Fruits; public class Banana implements Fruits{ public Banana(){ System.out.println("创建了一个香蕉类的对象"); } }
葡萄类
package Fruits; public class Grape implements Fruits{ public Grape(){ System.out.println("创建了一个葡萄类的对象"); } }
园丁
package Fruits; import java.util.Scanner; public class Gardener { public static void main(String[] args){ Gardener g=new Gardener(); g.create(); } private Fruits create(){ Scanner input = new Scanner(System.in); System.out.println("请输入水果名称:"); String name = input.next(); Fruits a=null; if(name.equals("苹果")){ a=new Apple(); } else if(name.equals("香蕉")){ a=new Banana(); } else if(name.equals("葡萄")){ a=new Grape(); } else{ System.out.println("没有这类水果"); } return a; } }