第十五次作业
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。
课后作业
• 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
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;
}
}
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");
}
}
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;
}
}
}
}
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;
}
}
}
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;
}
}
}
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 baobao;
public class Apple implements Fruit {
public Apple()
{
System.out.println("创建了一个苹果对象");
}
}
package baobao;
public class Banana implements Fruit{
public Banana()
{
System.out.println("创建了一个香蕉对象");
}
}
package baobao;
public class Pear implements Fruit{
public Pear()
{
System.out.println("创建了一个葡萄对象");
}
}
package baobao;
interface Fruit {
}
package baobao;
import java.util.Scanner;
public class Gardener {
public static void main(String[] args) {
Gardener g = new Gardener();
g.create();
}
private Fruit create() {
// TODO Auto-generated method stub
Scanner input = new Scanner(System.in);
System.out.println("请输入水果名称");
String name = input.next();
Fruit a = null;
if (name.equals("苹果")) {
a = new Apple();
} else if (name.equals("香蕉")) {
a = new Banana();
} else if (name.equals("葡萄")) {
a = new Pear();
} else {
System.out.println("没有这个水果");
}
return a;
}
}


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