java基础【工厂方法】

  对象的创建不仅可以通过new，还可以通过方法获取，另外反序列化和反射也可以。工厂模式解决主要问题是，用一种简单的办法获取对象。

package com.hike.javase.interfacetest;


interface Worker{
    void work();
}
class Teacher implements Worker{
    public void work(){
        System.out.println("老师在上课");
    }
}

class Student implements Worker{
    public void work(){
        System.out.println("学生在学习");
    }
}

class Factory{
    public static Worker getTeacher(){
        return new Teacher();
    }
    public static Worker getStudent(){
        return new Student();
    }
}

public class FactoryTest {
    public static void main(String[] args) {
        //Runtime runtime = Runtime.getRuntime(); //通过方法获取对象
        Worker worker = Factory.getTeacher(); //工厂的应用
        worker.work();

        worker = Factory.getStudent();
        worker.work();
    }
}