第十五作业
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 Cola; public class ColaEmployee { protected String name; protected int month; private int birthday; 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 int getBirthday() { return birthday; } public void setBirthday(int birthday) { this.birthday = birthday; } public ColaEmployee(){ } public ColaEmployee(String name,int month,int birthday){ super(); this.month =month; this.name =name; this.birthday =birthday; } public double getSalary(int month){ return 0; } } package Cola; public class SalariedEmployee extends ColaEmployee { protected double money; public SalariedEmployee (){ } public SalariedEmployee (String name,int month,int birthday,double money){ super(name,month,birthday); this.money=money; } public double getSalary(int month){ if(super.getMonth()==super.getBirthday()){ return money+100; }else{ return money; } } } package Cola; public class HourlyEmployee extends ColaEmployee { protected int hour; protected int hourmoney; public HourlyEmployee (){ } public HourlyEmployee (String name,int month,int birthday,int hour,int hourmoney){ super(name,month,birthday); this.hour =hour; this.hourmoney=hourmoney; } public double getSalary(int month){ if(super.getMonth()==super.getBirthday()){ if(hour>160) return hourmoney*160+(hour-160)*hourmoney+100; else return hourmoney*hour+100; }else{ if(hour>160) return hourmoney*160+(hour-160)*hourmoney; else return hourmoney*hour; } } } package Cola; public class SalesEmployee extends ColaEmployee { protected double monthsales; protected double per; public SalesEmployee (String name,int month,int birthday,double monthsales,double per){ super(name,month,birthday); this.monthsales =monthsales; this.per =per; } public double getSalary(int month){ if(super.getMonth()==super.getBirthday()) return +monthsales*per+100; else return monthsales*per; } } package Cola; 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 Cola; public class Test { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub ColaEmployee c1[]={new SalariedEmployee("sam",3,4,6666), new HourlyEmployee("cdv",3,5,110,888), new SalesEmployee("asd",3,7,6666,0.3) }; for(int i=0;i<c1.length ;i++){ new Company().getSalary( c1[i], 8); } } }
课后作业
• 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 D; import java.util.Scanner; public interface Fruit { } class Apple implements Fruit { public Apple() { System.out.println("创建了一个苹果对象"); } } class Banana implements Fruit { public Banana() { System.out.println("创建了一个香蕉对象"); } } class Putao implements Fruit { public Putao() { System.out.println("创建了一个葡萄对象"); } } class Gardener { public Fruit create() { Fruit f = null; Scanner input = new Scanner(System.in); String name = input.next(); if (name.equals("苹果")) { f = new Apple(); } else if (name.equals("香蕉")) { f = new Banana(); } else if (name.equals("葡萄")) { f = new Putao(); } else { System.out.println("不会种"); } return f; } } package D; public class Test8 { /** * @param args */ public static void main(String[] args) { Gardener g = new Gardener(); g.create(); } }