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 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 showAll 三个方法,另外又增加两个构造方法(为半径、颜色赋值的)。

 

·3.3main 方法中,声明创建每个子类的对象,并调用2

 

子类的 showAll 方法。

package hgjs;

 

public abstract class Shape {

double area;

double per;

char color;

 

public Shape() {

super();

}

public Shape(char color) {

super();

this.color = color;

}

 

public abstract double getArea();

public abstract double getPer();

public abstract void showAll();

public char getColor() {

return color;

}

 

 

 

 

}

package hgjs;

 

public class Rectangle extends Shape {

 

double Width;

double height;

 

public Rectangle() {

super();

}

 

public Rectangle(double width, double height,char color) {

super(color);

Width = width;

this.height = height;

}

 

 

public double getArea() {

double area=Width*height;

return area;

}

public double getPer() {

double per=2*(Width+height);

return per;

}

public void showAll() {

System.out.println("长是"+Width);

System.out.println("宽是"+height);

System.out.println("面积是"+getArea());

System.out.println("周长是"+getPer());

}

 

 

 

}

package hgjs;

 

public class Circle extends Shape {

 

double radius;

 

public Circle() {

super();

}

 

public Circle(double radius,char color) {

super(color);

this.radius = 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("半径是"+radius);

System.out.println("面积是"+getArea());

System.out.println("周长是"+getPer());

 

}

 

}

package hgjs;

 

public class main {

 

public static void main(String[] args) {

// TODO Auto-generated method stub

Rectangle p1=new Rectangle(2,4,'');

p1.showAll();

Circle p2=new Circle(4,'');

p2.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

 

package nb;

 

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);

 

 

 

}

package nb;

 

public class SalariedEmployee extends ColaEmployee{

double salary;

 

public SalariedEmployee() {

super();

}

 

public SalariedEmployee(String name,int birthday,double salary1) {

super(name,birthday);

salary=salary1;

 

}

 

public double getSalary(int month) {

if(birthday==month) {

salary=salary+100;

}else

salary=salary;

return salary;

}

 

 

 

 

 

 

 

 

 

}

package nb;

 

public class HourlyEmployee extends ColaEmployee {

double H_salary;

double time;

 

public HourlyEmployee() {

super();

}

 

public HourlyEmployee(String name,int birthday,double H_salary1,double time1) {

super(name,birthday);

H_salary=H_salary1;

time = time1;

}

 

public double getSalary(int month) {

double salary=0;

if(birthday==month) {

if(time>160)

salary=H_salary*160+(time-160)*H_salary*1.5+100;

else

salary=H_salary*time+100;

 

}else {

if(time>160)

salary=H_salary*160+(time-160)*H_salary*1.5;

else

salary=H_salary*time;

}

 

 

return salary;

}

 

 

 

 

 

 

}

package nb;

 

public class SalesEmployee extends ColaEmployee {

double sales;

double ticheng;

public SalesEmployee() {

super();

}

public SalesEmployee(String name,int birthday,double sales1, double ticheng1) {

super(name,birthday);

sales = sales1;

ticheng = ticheng1;

}

 

public double getSalary(int month) {

double salary=0;

if(birthday==month) {

salary=sales*ticheng+100;

}else {

salary=sales*ticheng;

}

return salary;

}

 

 

 

 

 

 

 

}

package nb;

 

public class Company {

 

public void show(ColaEmployee test,int month) {

System.out.println("员工:"+test.name+"在"+month+"月的工资是:"+test.getSalary(month));

}

 

 

 

}

package nb;

 

public class testcompany {

 

public static void main(String[] args) {

// TODO Auto-generated method stub

ColaEmployee[] t =new ColaEmployee[3];

t[0]=new SalariedEmployee("zhutianqi",6,12000);

t[1]=new HourlyEmployee("zhixiang",8,500,165);

t[2]=new SalesEmployee("taoxinyu",7,130000,0.4);

Company show1=new Company();

show1.show(t[0], 7);

show1.show(t[1], 8);

show1.show(t[2], 7);

}

 

}

 

 

 

 

 

 

posted on 2023-06-01 21:45  丝毫不慌  阅读(16)  评论(0编辑  收藏  举报