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。
4.1.ColaEmployee
package www; public class ColaEmployee { String name; int month; public ColaEmployee() { } public ColaEmployee(String name,int month){ this.name=name; 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
package www; public class SalariedEmployee extends ColaEmployee{ double monSalary; public SalariedEmployee(String name,int month,double monSalary) { super(name,month); this.monSalary=monSalary; } public double getSalary(int month) { if (super.month==month) { return monSalary +100; }else { return monSalary; } } }
4.3 HourlyEmployee:ColaEmployee的子类,按小时拿工资的员工
package www; public class HourlyEmployee extends ColaEmployee{ private int hourSalary; private int hourNum; public HourlyEmployee(String name, int month,int hourSalary,int hourNum) { super(name,month); this.hourSalary=hourSalary; this.hourNum=hourNum; } public double getSalary(int month) { if(super.month==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
package www; public class SalesEmployee extends ColaEmployee { private int monthSales; private double royaltyRate; 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.month == month) { return monthSales * royaltyRate + 100; }else { return monthSales * royaltyRate; } } }
4.5 Company类
package www; 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"); } }
TestCompany类
package www; public class TestCompany { public static void main(String[] args) { // TODO 自动生成的方法存根 ColaEmployee[] cel = { new SalariedEmployee("salariedEmployee", 6, 30000), new HourlyEmployee("hourlyEmployee", 5, 100, 300), new SalesEmployee("salesEmployee", 3, 7000000, 0.3) }; for (int i = 0; i < cel.length; i++) { new Company().getSalary(cel[i],6); } } }
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
5.15.1 创建4个类:
接口
package aaa; public interface Fruit { }
• 苹果
package aaa; public class Apple implements Fruit { public Apple() { System.out.println("创建了一个苹果对象"); } }
• 香蕉
package aaa; public class Banana implements Fruit{ public Banana() { System.out.println("创建了一个香蕉对象"); } }
• 葡萄
package aaa; public class Grape implements Fruit{ public Grape() { System.out.println("创建了一个葡萄对象"); } }
• 园丁
package aaa; import java.util.Scanner; public class Gardener { public Fruit create() { Scanner input = new Scanner(System.in); String name = input.next(); Fruit fruit = null; if (name.equals("苹果")) { fruit=new Apple(); } else if (name.equals("香蕉")) { fruit=new Banana(); } else if (name.equals("梨")) { fruit=new Pear(); } else { System.out.println("不会种"); } return fruit; } }
package aaa; public class Test { public static void main(String[] args) { // TODO 自动生成的方法存根 Gardener g = new Gardener(); g.create(); } }