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。

package w;

 

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;

 

}

}

public class rectangle extends shape {

double width;

double heigth;

public rectangle() {

super();

}

public rectangle(String color, double width, double heigth) {

super(color);

this.width = width;

this.heigth = heigth;

}

public double getarea() {

double area=width*heigth;

return area;

}

public double getper() {

double per=(width+heigth)*2;

return  per;

}

public void showall() {

System.out.println("长"+heigth);

System.out.println("宽"+width);

System.out.println("面积"+getarea());

System.out.println("周长"+getper());

System.out.println("颜色"+color);

}

}

 

 

public class circle extends shape {

double radius;

 

public circle(String color, double radius) {

super(color);

this.radius = radius;

}

 

public circle() {

super();

}

 

public double getper() {

double per=2*3.14*radius;

return per;

}

public double getarea() {

double area=3.14*radius*radius;

return area;

}

public void showall() {

System.out.println("半径"+radius);

System.out.println("面积"+getarea());

System.out.println("周长"+getper());

}

 

}

public class Test {

 

public static void main(String[] args) {

// TODO Auto-generated method stub

shape t=new rectangle("红色",2,3);

shape t1=new circle("白色",3);

t.showall();

t1.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(intmonth)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

•4.4SalesEmployee：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 w;

 

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 w;

 

public class salariedemployee extends colaemployee {

double salary;

 

public salariedemployee() {

super();

}

 

public salariedemployee(String name, int birthday, double salary) {

super(name, birthday);

this.salary = salary;

}

public double getsalary(int month) {

if(birthday==month) {

salary=salary+100;

}

return salary;

}

 

}

package w;

 

public class hourlyemployee extends colaemployee{

double gz;

double time;

public hourlyemployee() {

super();

}

public hourlyemployee(String name, int birthday, double gz, double time) {

super(name, birthday);

this.gz = gz;

this.time = time;

}

public double getsalary(int month) {

double salary=0;

if(time>160) {

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

}else

if(time<=160){

salary=gz*time;

}

if(birthday==month) {

salary=salary+100;

}

return salary;

}

 

}

package w;

 

public class salaryemployee extends colaemployee{

int moon;

double commission;

public salaryemployee() {

super();

}

public salaryemployee(String name, int birthday, int moon, double commission) {

super(name, birthday);

this.moon = moon;

this.commission = commission;

}

public double getsalary(int month) {

double salary=0;

salary=moon*commission;

if(birthday==month) {

salary=salary+100;

}

return salary;

}

 

}

package w;

 

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));

}

}

package w;

 

public class testcompany {

 

public static void main(String[] args) {

// TODO Auto-generated method stub

colaemployee[]t=new colaemployee[3];

t[0]=new salaryemployee("gg",10,3500,0.3);

t[1]=new hourlyemployee("cc",5,200,300);

t[2]=new salariedemployee("qq",40,4000);

company f=new company();

f.showsalary(t[0], 5);

f.showsalary(t[1], 3);

f.showsalary(t[1], 4);

f.showsalary(t[2], 2);

f.showsalary(t[2], 10);

 

 

}

 

}