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
package text;
public 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 double getSalary(int month){
return 0;
}
}
package text;
public class SalariedEmployee extends ColaEmployee {
int money;
public SalariedEmployee() {
super();
}
public SalariedEmployee(String name,int month,int money) {
super(name,month);
this.money = money;
}
public double getSalary(int month){
if(super.month==month){
return money+100;
}else{
return money;
}
}
}
package text;
public class HourlyEmployee extends ColaEmployee{
int hmoney;
int mday;
public HourlyEmployee(){
super();
}
public HourlyEmployee(String name,int month,int hmoney, int mday) {
super();
this.hmoney = hmoney;
this.mday = mday;
}
public double getSalary(int month){
if(super.month==month){
if(mday>160){
return hmoney*160*(mday-160)*1.5+100;
}else{
return hmoney * mday + 100;
}
}else{
if(mday>160){
return hmoney*160+(mday-160)*1.5;
}else{
return hmoney*mday;
}
}
}
}
package text;
public class SalesEmployee extends ColaEmployee {
int monthlysales;
double royaltyrate;
public SalesEmployee(String name, int month, int monthlysales, double royaltyrate) {
super();
this.monthlysales = monthlysales;
this.royaltyrate = royaltyrate;
}
public double getSalary(int month){
if(super.month==month){
return monthlysales*royaltyrate+100;
}else{
return monthlysales*royaltyrate;
}
}
}
package text;
public class Copany extends ColaEmployee {
public void getSalary(ColaEmployee c,int month){
System.out.println(c.name+"在"+month+"月的月薪为"+c.getSalary(month)+"元");
}
}
package text;
public class Testcompany {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
ColaEmployee c1[]={new SalariedEmployee("salare",4,70000),
new HourlyEmployee("hourlye",4,200,30),
new SalesEmployee("salese",4,17000,0.7)
};
for (int i = 0; i < c1.length; i++) {
new Copany().getSalary(c1[i], 4);
}
}
}
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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
package text;
import java.util.Scanner;
public interface Fruit {
}
class Apple implements Fruit {
public Apple() {
System.out.println("创建了一个苹果对象");
}
}
class Banana implements Fruit {
public Banana() {
System.out.println("创建了一个香蕉对象");
}
}
class Putao implements Fruit {
public Putao() {
System.out.println("创建了一个葡萄对象");
}
}
class Gardener {
public Fruit create() {
Fruit f = null;
Scanner input = new Scanner(System.in);
String name = input.next();
if (name.equals("苹果")) {
f = new Apple();
} else if (name.equals("香蕉")) {
f = new Banana();
} else if (name.equals("葡萄")) {
f = new Putao();
} else {
System.out.println("不会种");
}
return f;
}
}
package text;
public class textfruit {
public static void main(String[] args) {
Gardener g = new Gardener();
g.create();
}
}
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