Java封装、继承、多态、super杂糅在一起的小练习，公司雇员员工工资问题（Employee），练习扩展：创建一个Employee数组，分别创建不同的Employee对象，并打印某个月的工资

@Java

大家好，我是Ziph！

下面分为三种打印方法：

import java.util.Scanner;

/** 
* @author Ziph
* @date 2020年2月21日
* @Email [email protected]
*/
public class TestDemo {
	public static void main(String[] args) {
//-----------------------------------------------------------------------------------------
//方法一、
		SalariedEmployee e1 = new SalariedEmployee("Ziph", 3, 100000);
		HourlyEmployee e2 = new HourlyEmployee("Join", 4, 170, 20);
		SalesEmployee e3 = new SalesEmployee("Marry", 8, 20000, 0.45);
		BasePlusSalesEmployee e4 = new BasePlusSalesEmployee("Tom", 11, 30000, 0.45 , 5000);
		System.out.println("该员工的工资为：" + e1.getSalary(3));
		System.out.println("该员工的工资为：" + e2.getSalary(3));
		System.out.println("该员工的工资为：" + e3.getSalary(3));
		System.out.println("该员工的工资为：" + e4.getSalary(3));
//-----------------------------------------------------------------------------------------
//方法二、
//此方法避免了代码的重复，降低了耦合性，提高了计算机的执行效率。
		Employee e1 = new SalariedEmployee("Ziph", 3, 100000);
		Employee e2 = new HourlyEmployee("Join", 4, 170, 20);
		Employee e3 = new SalesEmployee("Marry", 8, 20000, 0.45);
		Employee e4 = new BasePlusSalesEmployee("Tom", 11, 30000, 0.45 , 5000);
		TestDemo tt = new TestDemo();
		tt.print(e1, 3);
		tt.print(e2, 3);
		tt.print(e3, 3);
		tt.print(e4, 3);
//-----------------------------------------------------------------------------------------
//方法三、
//创建一个Employee数组，分别创建不同的Employee对象，并打印某个月的工资
		Employee[] ee = new Employee[] {
			new SalariedEmployee("Ziph", 3, 100000),
			new HourlyEmployee("Join", 4, 170, 20),
			new SalesEmployee("Marry", 8, 20000, 0.45),
			new BasePlusSalesEmployee("Tom", 11, 30000, 0.45 , 5000)
		};
		for (int i = 0; i < ee.length; i++) {
			print(ee[i], 3);
		}
//-----------------------------------------------------------------------------------------
	}
	//打印工资
	public void print(Employee e, int month) {
		System.out.println("该员工的工资为：" + e.getSalary(month));
	}
}

class Employee {//所有公司父类
	private String name;//员工姓名
	private int month;//员工的生日月份

	public Employee(String name, int month) {
		this.name = name;
		this.month = month;
	}
	
	//如果员工过生日，公司会额外奖励100元
	public double getSalary(int month) {
		if (month != this.month) {
			return 0.0;
		} else {
			return 100.0;
		}
	}
}

//拿固定工资的员工
class SalariedEmployee extends Employee {
	private double salary;//月薪
	
	public SalariedEmployee(String name, int month, double salary) {
		super(name, month);
		this.salary = salary;
	}

	public double getSalary(int month) {
		double bonus = super.getSalary(month);//判断是否有奖金
		return salary + bonus;
	}
}

//小时工，每月工作超出160个小时按照1.5倍工资算
class HourlyEmployee extends Employee {
	private int hours;//每个月的小时数
	private double hourlySalary;//每个小时的工资
	
	public HourlyEmployee(String name, int month,int hours, double hourlySalary) {
		super(name, month);
		this.hours = hours;
		this.hourlySalary = hourlySalary;
	}
	
	public double getSalary(int month) {
		double bonus = super.getSalary(month);//判断是否有奖金
		if (hours > 0 && hours <= 160) {//160个小时内的工资
			return hours * hourlySalary + bonus;
		} else {//160个小时外的工资
			return 160 * hourlySalary + (hours - 160) * hourlySalary * 1.5 + bonus;
		}
	}
}

//销售员工，工资由月销售额和提成率决定
class SalesEmployee extends Employee {
	private double sales;//月銷售額
	private double rate;//提成率
	
	public SalesEmployee(String name, int month) {
		super(name, month);
	}

	public SalesEmployee(String name, int month, double sales, double rate) {
		super(name, month);
		this.sales = sales;
		this.rate = rate;
	}

	public double getSalary(int month) {
		double bonus = super.getSalary(month);//判断是否有奖金
		return sales * rate + bonus;
	}
}

//有固定的底薪的销售人员，工资由底薪加销售提成
class BasePlusSalesEmployee extends SalesEmployee {
	private double baseSalary;//月底薪

	public BasePlusSalesEmployee(String name, int month, double sales, double rate, double baseSalary) {
		super(name, month, sales, rate);
		this.baseSalary = baseSalary;
	}

	public double getSalary(int month) {
		double bonus = super.getSalary(month);//月销售乘提成率（是否有含奖金）
		return baseSalary + bonus;
	}
}

执行结果依次测试都是同一个答案：

有问题请大家留言回复！