2020.5.18

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。

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。

public class ColaEmployee {
    String name;
    int month;
    public ColaEmployee() {

    }
    public ColaEmployee(String name,int month){
        this.name=name;
        this.month=month;
    }    
    public double getSalary(int month) {
        return 0;
    }
}

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;
        }    
    }
}

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;
        }
    }         
  }
}

public class SalesEmployee extends ColaEmployee {
    private int monthSales;// 月销售额
    private double royaltyRate;// 提成率
 
    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;
        }
    }
 
}

public class Company {
//  打印出某月某个员工的工资数额
    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 TestCompany {
    public static void main(String[] args) {
        //创建、初始化数组
        ColaEmployee[] all = {
                new SalariedEmployee("张三", 5, 30000),//name,month,月薪
                new HourlyEmployee("李四", 5, 100, 300),//name,month,时薪,小时数
                new SalesEmployee("王五", 3, 7000000, 0.3)//name,month,月销售额，提成率
                };
        //数组遍历
        for (int i = 0; i < all.length; i++) {
            new Company().getSalary(all[i],5);
        }
    }
}