编写工资系统

编写工资系统,实现不同类型员工(多态)的按月发放工资。如果当月出现某个Employee对象的生日,则将该雇员的工资增加100元。

做这个题的时候思考了好久还是不会做,于是我又重新看了一遍知识点,再来做的时候思路清晰了点但是还是有没有做出来,最后通过参考别人的做法以及改进自己的代码,写出来了如下:

题目

编写工资系统,实现不同类型员工(多态)的按月发放工资。如果当月出现某个
Employee对象的生日,则将该雇员的工资增加100元。
实验说明:
(1)定义一个Employee类,该类包含:
private成员变量name,number,birthday,其中birthday 为MyDate类的对象;
abstract方法earnings();
toString()方法输出对象的name,number和birthday。
(2)MyDate类包含:
private成员变量year,month,day ;
toDateString()方法返回日期对应的字符串:xxxx年xx月xx日
(3)定义SalariedEmployee类继承Employee类,实现按月计算工资的员工处
理。该类包括:private成员变量monthlySalary;
实现父类的抽象方法earnings(),该方法返回monthlySalary值;toString()方法输出员工类型信息及员工的name,number,birthday。
(4)参照SalariedEmployee类定义HourlyEmployee类,实现按小时计算工资的员工处理。该类包括:
private成员变量wage和hour;
实现父类的抽象方法earnings(),该方法返回wagehour值;
toString()方法输出员工类型信息及员工的name,number,birthday。
(5)定义PayrollSystem类,创建Employee变量数组并初始化,该数组存放各类雇员对象的引用。利用循环结构遍历数组元素,输出各个对象的类型,name,number,birthday,以及该对象生日。当键盘输入本月月份值时,如果本月是某个Employee对象的生日,还要输出增加工资信息。
/

参考提示:
//定义People类型的数组People c1[]=new People[10];
//数组元素赋值
c1[0]=new People(“John”,“0001”,20);
c1[1]=new People(“Bob”,“0002”,19);
//若People有两个子类Student和Officer,则数组元素赋值时,可以使父类类型的数组元素指向子类。
c1[0]=new Student(“John”,“0001”,20,85.0);
c1[1]=new Officer(“Bob”,“0002”,19,90.5);
*/

Employee类的编写

package com.wedu.test4;

public abstract class Employee {
    private String name;
    private int number;
    private  MyDate birthday;

    public Employee() {
    }

    public Employee(String name, int number, MyDate birthday) {
        this.name = name;
        this.number = number;
        this.birthday = birthday;
    }


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getNumber() {
        return number;
    }

    public void setNumber(int number) {
        this.number = number;
    }

    public MyDate getBirthday() {
        return birthday;
    }

    public void setBirthday(MyDate birthday) {
        this.birthday = birthday;
    }

    abstract double earnings();


    public String toString() {

        return "name="+name+"\tnumber="+number+"\tbirthday="+birthday.toDateString();
    }
}

MyDate类的编写

package com.wedu.test4;

public class MyDate {
    private int year;
    private int month;
    private int day;

    public MyDate() {
    }

    public MyDate(int year, int month, int day) {
        this.year = year;
        this.month = month;
        this.day = day;
    }

    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public int getMonth() {
        return month;
    }

    public void setMonth(int month) {
        this.month = month;
    }

    public int getDay() {
        return day;
    }

    public void setDay(int day) {
        this.day = day;
    }

    public String toDateString(){

        return year+"年"+month+"月"+day+"日";
    }
}

SalaryEmployee类的编写

package com.wedu.test4;


public class SalaryEmployee extends Employee{
    private double monthlySalary;

    public SalaryEmployee() {
    }

    public SalaryEmployee(String name, int number, MyDate birthday, double monthlySalary) {
        super(name, number, birthday);
        this.monthlySalary = monthlySalary;
    }

    public double getMonthlySalary() {
        return monthlySalary;
    }

    public void setMonthlySalary(double monthlySalary) {
        this.monthlySalary = monthlySalary;
    }

    public SalaryEmployee(double monthlySalary, String name, int number, MyDate birthday) {
        super(name,number,birthday);
        this.monthlySalary=monthlySalary;

    }

    @Override
    double earnings() {
        return  monthlySalary;
    }


    public String toString() {

        return "SalariedEmployee:\t"+super.toString();
    }
}

HourEmployee类的编写

package com.wedu.test4;

public class HourEmployee extends Employee{
    private double wage;
    private double hour;

    public HourEmployee() {
    }

    public HourEmployee(String name, int number, MyDate birthday, double wage, double hour) {
        super(name, number, birthday);
        this.wage = wage;
        this.hour = hour;
    }

    @Override
    double earnings() {
        return wage*hour*30;
    }//默认每个月都是30天

    @Override
    public String toString() {
        return "HourEmployee:\t"+super.toString();
    }
}

PayrollSystem类的编写

package com.wedu.test4;

import java.util.Scanner;

public class PayrollSystem {
    public static void main(String[] args) {
        MyDate myDate1 = new MyDate(2000, 12, 2);
        MyDate myDate2 = new MyDate(2001, 3, 9);
        MyDate myDate3 = new MyDate(2002, 5, 8);
        MyDate myDate4 = new MyDate(2003, 9, 29);
        Employee[] employee = new Employee[4];
        Employee p1 = new SalaryEmployee("李强", 1, myDate1, 100000);
        Employee p2 = new SalaryEmployee("江山", 2, myDate2, 100000);
        Employee h1 = new HourEmployee("张力", 4, myDate3, 24, 12);
        Employee h2 = new HourEmployee("蒋悦", 5, myDate4, 26, 10);
        employee[0] = p1;
        employee[1] = p2;
        employee[2] = h1;
        employee[3] = h2;
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入计算工资的月份(1-12):");
        int month = sc.nextInt();
        PayrollSystem payrollSystem = new PayrollSystem();
        for (int i = 0; i < employee.length; i++) {
            System.out.println(employee[i]);
            double salary = employee[i].earnings();
            System.out.println("月工资为:" + salary);
            if (month == employee[i].getBirthday().getMonth()) {
                double finalSalary = employee[i].earnings() + 100;
                System.out.println("本月是你的的生日,奖励你红包100元,最后你的工资是" + finalSalary);
            }
        }
    }

}

运行结果

D:\develop\jdk-12.0.2\bin\java.exe "-javaagent:D:\develop\IntelliJ IDEA 2021.3.3\lib\idea_rt.jar=62764:D:\develop\IntelliJ IDEA 2021.3.3\bin" -Dfile.encoding=UTF-8 -classpath D:\develop\ideaprojects\javase-project\out\production\abstractAndInterfaceTest com.wedu.test4.PayrollSystem
请输入计算工资的月份(1-12):
9
SalariedEmployee:	name=李强	number=1	birthday=2000122日
月工资为:100000.0
SalariedEmployee:	name=江山	number=2	birthday=200139日
月工资为:100000.0
HourEmployee:	name=张力	number=4	birthday=200258日
月工资为:8640.0
HourEmployee:	name=蒋悦	number=5	birthday=2003929日
月工资为:7800.0
本月是你的的生日,奖励你红包100,最后你的工资是7900.0

Process finished with exit code 0
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