4、Cola公司的雇员分为以下若干类：(知识点：多态)
(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。
(2) SalariedEmployee ： ColaEmployee 的子类，拿固定工资的员工。
属性：月薪
(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) 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
(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 nn;
public class ColaEmployee {
String name;
int birthmonth;
public void getSalary(int month) {
System.out.println("月份:"+month);
}
}
package nn;
public class SalariedEmployee extends ColaEmployee {
double monSalary;
public SalariedEmployee(String name,int month,double monSalary){
super(name,month);
this.monSalary=monSalary;
}
public double getSalary(int month){
if(super.month==month){
return monSalary+100;
}else{
return monSalary;
}
}
}
package nn;
public class HourlyEmployee extends ColaEmployee {
private int hourSalary;
private int hourNum;
public HourlyEmployee (String name,int month,int hourSalary,int hourNum){
super(name,month);
this.hourSalary=hourSalary;
this.hourNum=hourNum;
}
public double getSalary(int month) {
if(super.month==month) {
if (hourNum>160) {
return hourSalary*160+hourSalary*(hourNum-160)*1.5+100;
}else {
return hourSalary*hourNum+100;
}
}else {
if (hourNum>160) {
return hourSalary*160+hourSalary*(hourNum-160)*1.5;
}else {
return hourSalary*hourNum;
}
}
}
}
package nn;
public class SalesEmployee extends ColaEmployee{
private int monthsales;
private double royaltyRate;
public SalesEmployee(String name, int month,int monthSales,double royaltyRate) {
super(name, month);
this.monthsales = monthSales;
this.royaltyRate =royaltyRate;
}
public double getSalary(int month) {
if(super.month == month) {
return monthsales * royaltyRate + 100;
}else {
return monthsales * royaltyRate;
}
}
}
package nn;
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");
}
}
package nn;
public class TestCompany {
public static void main(String[] args) {
// TODO Auto-generated method stub
ColaEmployee[] cel = {
new SalariedEmployee("salariedEmployee", 6, 30000),//name,month,月薪
new HourlyEmployee("hourlyEmployee", 5, 100, 300),//name,month,时薪,小时数
new SalesEmployee("salesEmployee", 3, 7000000, 0.3)//name,month,月销售额，提成率
};
//数组遍历
for (int i = 0; i < cel.length; i++) {
new Company().getSalary(cel[i],7);
}
}
}