java实现 *Cola公司的雇员分为以下若干类： (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。 */

好的，下面是具体的实现代码：

// ColaEmployee.java
public class ColaEmployee {
    protected String name;
    protected int birthMonth;

    public ColaEmployee(String name, int birthMonth) {
        this.name = name;
        this.birthMonth = birthMonth;
    }

    public double getSalary(int month) {
        double salary = 0;
        return salary;
    }
}

// SalariedEmployee.java
public class SalariedEmployee extends ColaEmployee {
    private double monthlySalary;

    public SalariedEmployee(String name, int birthMonth, double monthlySalary) {
        super(name, birthMonth);
        this.monthlySalary = monthlySalary;
    }

    @Override
    public double getSalary(int month) {
        double salary = monthlySalary;
        if (month == birthMonth) {
            salary += 100;
        }
        return salary;
    }
}

// HourlyEmployee.java
public class HourlyEmployee extends ColaEmployee {
    private double hourlySalary;
    private int workingHours;

    public HourlyEmployee(String name, int birthMonth, double hourlySalary, int workingHours) {
        super(name, birthMonth);
        this.hourlySalary = hourlySalary;
        this.workingHours = workingHours;
    }

    @Override
    public double getSalary(int month) {
        double salary = hourlySalary * workingHours;
        if (workingHours > 160) {
            salary += hourlySalary * 1.5 * (workingHours - 160);
        }
        if (month == birthMonth) {
            salary += 100;
        }
        return salary;
    }
}

// SalesEmployee.java
public class SalesEmployee extends ColaEmployee {
    private double monthlySales;
    private double commissionRate;

    public SalesEmployee(String name, int birthMonth, double monthlySales, double commissionRate) {
        super(name, birthMonth);
        this.monthlySales = monthlySales;
        this.commissionRate = commissionRate;
    }

    @Override
    public double getSalary(int month) {
        double salary = monthlySales * commissionRate;
        if (month == birthMonth) {
            salary += 100;
        }
        return salary;
    }
}

// Company.java
public class Company {
    public static void printSalary(ColaEmployee employee, int month) {
        System.out.println(employee.name + "在" + month + "月的工资为：" + employee.getSalary(month));
    }
}

// TestCompany.java
public class TestCompany {
    public static void main(String[] args) {
        ColaEmployee[] employees = new ColaEmployee[4];
        employees[0] = new SalariedEmployee("Tom", 3, 3000);
        employees[1] = new HourlyEmployee("Jerry", 4, 20, 180);
        employees[2] = new SalesEmployee("John", 5, 50000, 0.05);
        employees[3] = new SalariedEmployee("Mary", 6, 3500);

        for (int i = 1; i <= 12; i++) {
            System.out.println("==========" + i + "月份工资==========");
            for (ColaEmployee employee : employees) {
                Company.printSalary(employee, i);
            }
        }
    }
}

在这个程序中，我们先定义了一个父类`ColaEmployee`，包含所有员工都有的属性和方法，然后分别定义了子类`SalariedEmployee`、`HourlyEmployee`和`SalesEmployee`，分别实现了各自的计算工资方法。最后定义了一个`Company`类，包含了一个静态方法`printSalary`，用来打印某个员工在某个月的工资。在`TestCompany`类中，我们实例化了不同类型的员工，并使用一个数组存储起来，然后循环输出每个员工在每个月的工资情况。