抽象类的实例应用

1.员工

package bigguy;

/**
 * @author liu$
 * @version 1.0
 * @description: TODO
 * @date $ $
 */
public abstract class Employee {
    private String name ;
    private  int number ;
    private MyDate birthday ;

    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;
    }

    public abstract double earnings( ) ;

    @Override
    public String toString() {
        return "name='" + name + '\'' +
                ", number=" + number +
                ", birthday=" + birthday.toDateString() +
                '}';
    }


}
2.生日

package bigguy;

/**
 * @author liu$
 * @version 1.0
 * @description: TODO
 * @date $ $
 */
public class MyDate {
    private int year ;
    private int month ;
    private int day ;

    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 "MyDate{" +
                "year=" + year +
                ", month=" + month +
                ", day=" + day +
                '}';
    }
}
3.普通月薪员工

package bigguy;

/**
 * @author liu$
 * @version 1.0
 * @description: TODO
 * @date $ $
 */
public class SalariedEmployee extends Employee {
    private double mothlysalary ;
    public SalariedEmployee(String name, int number, MyDate birthday) {
        super(name, number, birthday);
    }
    public SalariedEmployee(String name, int number, MyDate birthday,double mothlysalary) {

        super(name, number, birthday);
        this.mothlysalary = mothlysalary;
    }

    public double getMothlysalary() {
        return mothlysalary;
    }

    public double earnings() {

        return mothlysalary ;
    }

    public String toString() {
        return "SalariedEmployee{" +super.toString() +"]" ;
    }
}
4.小时工

package bigguy;

/**
 * @author liu$
 * @version 1.0
 * @description: TODO
 * @date $ $
 */
public class HourlyEmployee extends Employee {
    private int wage;//每小时工资
    private int hour;//一个月工作了多少小时

    public HourlyEmployee(String name , int number , MyDate birthday ) {
        super( name , number , birthday ) ;
    }

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

    public int getWage() {
        return wage;
    }

    public void setWage(int wage) {
        this.wage = wage;
    }

    public int getHour() {
        return hour;
    }

    public void setHour(int hour) {
        this.hour = hour;
    }

    @Override
    public double earnings() {
        return wage * hour;
    }
        public String toString() {
            return "HourlyEmployee{" + super.toString() + "]";
        }
}
5.总薪水(生日+100)

package bigguy;

import java.util.Scanner;

/**
 * @author liu$
 * @version 1.0
 * @description: TODO
 * @date $ $
 */
public class PayrollSystem {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in) ;
        System.out.println("请输入当月的月份:");
        int month = scanner.nextInt() ;
         Employee[] emps = new Employee[2] ;
         emps[0] = new SalariedEmployee("大嘴盈",1001,new MyDate(2003,9,28),5000) ;
         emps[1] = new HourlyEmployee("柳",1002,new MyDate(2003,8,10),240,60) ;

        for (int i = 0; i < emps.length; i++) {
            System.out.println(emps[i]);
            double salary = emps[i].earnings() ;
            System.out.println("月工资为:"+salary);

            if (month==emps[i].getBirthday().getMonth()){
                System.out.println("生日快乐，给你加100块");
            }
        }
    }
}