6.11第十三次作业
4、 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
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 oop; public abstract class ColaEmployee { String Ename; int Emonth; public abstract double getSalary(int month); public String getEname() { return Ename; } public void setEname(String ename) { Ename = ename; } public int getEmonth() { return Emonth; } public void setEmonth(int emonth) { Emonth = emonth; } public ColaEmployee(String ename, int emonth) { super(); Ename = ename; Emonth = emonth; } }
package oop; public class SalariedEmployee extends ColaEmployee{ double MSalary; public SalariedEmployee(String ename, int emonth, double mSalary) { super(ename, emonth); MSalary = mSalary; } @Override public double getSalary(int month) { // TODO Auto-generated method stub if(month==super.Emonth){ return (MSalary+100); }else{ return MSalary; } } }
package oop; public class HourlyEmployee extends ColaEmployee{ double HSalary; double MHour; public HourlyEmployee(String ename, int emonth, double hSalary, double mHour) { super(ename, emonth); HSalary = hSalary; MHour = mHour; } public double getSalary(int month) { if (super.Emonth == month) { if (MHour > 160) { return HSalary * 160 + HSalary * (MHour - 160) * 1.5 + 100; } else { return HSalary * MHour + 100; } } else { if (MHour > 160) { return HSalary * 160 + HSalary * (MHour - 160) * 1.5; } else { return HSalary * MHour; } } } }
package oop; public class SalesEmployee extends ColaEmployee{ double MNum; double TiChengLv; public SalesEmployee(String ename, int emonth, double mNum, double tiChengLv) { super(ename, emonth); MNum = mNum; TiChengLv = tiChengLv; } public double getSalary(int month){ if(super.Emonth==month){ return MNum*TiChengLv+100; }else{ return MNum*TiChengLv; } } }
package oop; public class Company { public void getSalary(ColaEmployee c, int month) { System.out .println(c.Ename + month + "月的月薪为" + c.getSalary(month) + "元"); } }
package oop; public class TestCompany { /** * @param args */ public static void main(String[] args) { ColaEmployee c[] = { new SalariedEmployee("小刘", 1, 1000), new HourlyEmployee("小金", 8, 110, 100), new SalesEmployee("小仙", 2, 30000, 0.56) }; for (int i = 0; i < c.length; i++) { new Company().getSalary(c[i], 1); } } }
• 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 oop; 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 Grape implements Fruit { public Grape() { 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 Grape(); } else { System.out.println("no"); } return f; } }
package oop; public class TestFruit { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Gardener g = new Gardener(); g.create(); } }