第九次作业
3、设计三个类,分别如下:(知识点:抽象类及抽象方法)[必做题]
·3.1设计 Shape 表示图形类,有面积属性 area 、周长属性 per ,
颜色属性 color ,有两个构造方法(一个是默认的、一个是为颜色赋值的),还有3个抽象方法,分别是: getArea 计算面积、 getPer 计算周长、 showAll 输出所有信息,还有一个求颜色的方法 getColor 。
·3.2设计2个子类:
·3.2.1 Rectangle 表示矩形类,增加两个属性, Width 表示长度
、 height 表示宽度,重写 getPer 、 getArea 和 showAll 三个方法,另外又增加一个构造方法(一个是默认的、一个是为高度、宽度、颜色赋值的)。
3.2.2 Circle 表示圆类,增加1个属性, radius 表示半径,重写
getPer 、 getArea 和 showAll 三个方法,另外又增加两个构造方法(为半径、颜色赋值的)。
·3.3在 main 方法中,声明创建每个子类的对象,并调用2个
子类的 showAll 方法。
//Shape类 package xingzhuang; public abstract class Shape { double area; double per; String color; public Shape() { super(); } public Shape(String color) { super(); this.color = color; } public abstract double getArea(); public abstract double getPer(); public abstract void showAll(); public String getColor() { return color; } } //Rectangle 类 package xingzhuang; public class Rectangle extends Shape { double Width; double height; public Rectangle() { super(); } public Rectangle(double width, double height,String color) { super(color); Width = width; this.height = height; } public double getArea() { double Area=Width*height; return Area ; } public double getPer() { double Per=2*Width+2*height; return Per; } public void showAll() { System.out.println("长:"+height); System.out.println("宽:"+Width); System.out.println("面积:"+getArea()); System.out.println("周长:"+getPer()); System.out.println("颜色"+color); } } //Circle 类 package xingzhuang; public class Circle extends Shape{ public Circle() { super(); } public Circle(double radius,String color) { super(color); this.radius = radius; } double radius; public double getArea() { double Area=radius*radius*3.14; return Area; } public double getPer() { double Per=2*3.14*radius; return Per; } public void showAll() { System.out.println("半径:"+radius); System.out.println("面积:"+getArea()); System.out.println("周长:"+getPer()); System.out.println("颜色"+color); } } //menu 类 package xingzhuang; public class menu { public static void main(String[] args) { // TODO Auto-generated method stub Shape test_1=new Circle(2,"黑的"); Shape test_2=new Rectangle(5,5,"白的"); test_1.showAll(); test_2.showAll(); } }
·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
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在一个 ColaEmployee 数组里,并单元出数组中每个员工当月的工资。
资的员工。属性:月薪
//ColaEmployee类 package Cola; public abstract class ColaEmployee { String name; int birthday; public ColaEmployee() { super(); } public ColaEmployee(String name, int birthday) { super(); this.name = name; this.birthday = birthday; } public abstract double getSalary(int month); } //SalariedEmployee类 package Cola; public class SalariedEmployee extends ColaEmployee{ double Salary; public SalariedEmployee() { super(); } public SalariedEmployee(String name,int birthday,double salary) { super(name,birthday); Salary = salary; } public double getSalary(int month) { if(birthday==month) { Salary=Salary+100; } return Salary; } } //HourlyEmployee类 package Cola; public class HourlyEmployee extends ColaEmployee{ double Hour_Salary; double Moon_WorkHour; public HourlyEmployee() { super(); } public HourlyEmployee(String name,int birthday,double hour_Salary, double moon_WorkHour) { super(name,birthday); Hour_Salary = hour_Salary; Moon_WorkHour = moon_WorkHour; } public double getSalary(int month) { double Salary=0; if(Moon_WorkHour<=160) { Salary=Hour_Salary*Moon_WorkHour; }else if(Moon_WorkHour>160) { Salary=Hour_Salary*Moon_WorkHour+(Moon_WorkHour-160)*Hour_Salary*1.5; } if(birthday==month) { Salary=Salary+100; } return Salary; } } //SalesEmployee类 package Cola; public class SalesEmployee extends ColaEmployee{ int Moon_Sales; double Commission; public SalesEmployee() { super(); } public SalesEmployee(String name, int birthday, int moon_Sales, double commission) { super(name, birthday); Moon_Sales = moon_Sales; Commission = commission; } public double getSalary(int month) { double Salary=0; Salary=Moon_Sales*Commission; if(birthday==month) { Salary=Salary+100; } return Salary; } } //Company类 package Cola; public class Company { public void ShowSalary(ColaEmployee test,int month) { System.out.println("员工:"+test.name+"\n月份:"+month+"\n工资状况:"+test.getSalary(month)); } } //测试类 package Cola; public class TestCompany { public static void main(String[] args) { ColaEmployee[] test=new ColaEmployee[3]; test[0]=new SalariedEmployee("leisihao",5,50000); test[1]=new HourlyEmployee("zhixiang",2,150,200); test[2]=new SalesEmployee("taoxinyv",9,120000,0.3); Company show_fun=new Company(); show_fun.ShowSalary(test[0], 5); show_fun.ShowSalary(test[1], 2); show_fun.ShowSalary(test[1], 3); show_fun.ShowSalary(test[2], 9); show_fun.ShowSalary(test[2], 10); } }