java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。
• 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 text; public abstract 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; } }
package text; 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 text; public class HourlyEmployee extends ColaEmployee { protected int hour; protected int hoursalary; public HourlyEmployee() { super(); } public HourlyEmployee(String name, int month, int hour, int hoursalary) { super(name, month); this.hour = hour; this.hoursalary = hoursalary; } public double getSalary(int month) { if (super.month == month) { if (hour > 160) { return hoursalary * 160 + hoursalary * (hour - 160) * 1.5 + 100; } else { return hoursalary * hour + 100; } } else { if (hour > 160) { return hoursalary * 160 + hoursalary * (hour - 160) * 1.5; } else { return hoursalary * hour; } } } }
package text; public class SalariedEmployee extends ColaEmployee { private double salary; public SalariedEmployee(double salary) { super(); this.salary = salary; } public SalariedEmployee(String name, int month, double salary) { super(name, month); this.salary = salary; } public double getSalary(int month) { if (super.month == month) { return month + 100; } else { return salary; } } }
package text; public class SalesEmployee extends ColaEmployee { protected int yuexiaoshou; protected double tuchenglv; public SalesEmployee() { super(); } public SalesEmployee(String name, int month,int yuexiaoshou, double tuchenglv) { super(name,month); this.yuexiaoshou = yuexiaoshou; this.tuchenglv = tuchenglv; } public double getSalary(int month){ if(super.month==month){ return yuexiaoshou*tuchenglv+100; }else{ return yuexiaoshou*tuchenglv; } } }
package text; public class testCompany { public static void main(String[] args) { // TODO Auto-generated method stub ColaEmployee c1[] = { new SalariedEmployee("a", 11, 20000), new HourlyEmployee("b", 6, 200, 200), new SalesEmployee("c", 5, 330000, 0.5) }; for (int i = 0; i < c1.length; i++) { new company().getSalary(c1[i], 5); } } }
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 zy; import java.applet.Applet; import java.util.Scanner; public class Gardener { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Gardener g=new Gardener(); g.create(); } public Fruit create(){ Scanner input=new Scanner(System.in); String name=input.next(); Fruit f=null; if(name.equals("苹果")){ f=new Apple(); } if(name.equals("香蕉")){ f=new Banana(); } if(name.equals("葡萄")){ f=new Grape(); } return f; } }
package zy; public interface Fruit { } class Apple implements Fruit{ public Apple(){ System.out.println("创建了一个苹果类的对象"); } } class Banana implements Fruit{ public Banana(){ System.out.println("创建了一个香蕉类的对象"); } } class Grape implements Fruit{ public Grape(){ System.out.println("创建了一个葡萄类的对象"); } }