工厂方法设计模式

package exer1;
//工厂方法的设计模式（创建对象的时机）
public class TestFactoryMethod {
    public static void main(String[] args) {
        IWorkFactory i=new TeacherWorkFactory();//多态性
        IWorkFactory i1=new StudentWorkFactory();
        i.getWork().doWork();
        i1.getWork().doWork();
    }
}

interface IWorkFactory{
    Work getWork();
}
class TeacherWorkFactory implements IWorkFactory{
    public Work getWork(){
        return new TeacherWork();//注意返回的new TeacherWork()，下文有过的
    }
}
class StudentWorkFactory implements IWorkFactory{
    public Work getWork(){
        return new StudentWork();
    }
}
interface Work{
    void doWork();
}
class StudentWork implements Work{
    public void doWork(){
        System.out.println("学生写作业");
    }
}
class TeacherWork implements Work{
    public void doWork(){
        System.out.println("老师批改作业");
    }
}