Java学习之模板方法设计模式小例子

这个例子中应用了abstract关键字去体现 模板方法的设计模式。

package oop.exer10;

public abstract class Employee {

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


	
	
}

package oop.exer10;

public class MyDate {

	private int year;
	private int month;
	private int day;
	
	
	
	
	public MyDate() {
		super();
	}




	public MyDate(int year, int month, int day) {
		super();
		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";
	}
}

package oop.exer10;

public class HourlyEmployee extends Employee{
	
	private int wage;//每小时的工资
	private int hour;//月工作小时数
	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()+"]";
	}
	
}

package oop.exer10;

public class SalariedEmployee extends Employee{
	
	private double monthlySalary;//月工资
	
	public double getMonthlySalary() {
		return monthlySalary;
	}

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

	public SalariedEmployee(String name, int number, MyDate birthday,double monthlySalary) {
		super(name, number, birthday);
		// TODO Auto-generated constructor stub
		this.monthlySalary=monthlySalary;
	}

	@Override
	public double earnings() {
	
		return monthlySalary;
	}
	
	public String toString()
	{
		return "SalariedEmployee ["+super.toString()+"]";
	}
	
}

package oop.exer10;

import java.util.Calendar;
import java.util.Scanner;

public class PayrollSystem {
	public static void main(String[] args) {
		//方式一
//		Scanner scan=new Scanner(System.in);
//		System.out.println("请输入当月的月份");
//		int month = scan.nextInt();
		//方式二
		Calendar calendar = Calendar.getInstance();
		int month=calendar.get(Calendar.MONTH)+1;//获取当前的月份 一月份是0
		
		Employee[] emps=new Employee[2];
		//此处new的是数组而不是new的abstract类型的Employee对象，数组元素类型是Employee类型
		emps[0]=new SalariedEmployee("Tom", 1001, new MyDate(1998, 11, 27),10000);
		emps[1]=new HourlyEmployee("Jerry", 1002, new MyDate(2000, 12, 28),60,240);
		
		for(int i=0;i