//模板方法：步骤提前设计好，用的时候只需要改步骤内容

public class TemplateDemo {

	public static void main(String[] args) {

		// TODO Auto-generated method stub

		teacher DBtea = new DBTeacher();

		teacher Ctea = new CTeacher();

		DBtea.work();

		Ctea.work();

	}

}

abstract class teacher{

	public void prepared() {

		System.out.println("整理资料");

		System.out.println("打开投影仪");

	}

	public abstract void teaching();//抽象方法，子类需重写

	public void end() {

		System.out.println("关闭投影仪");

		System.out.println("带走资料");

	}

	//老师的工作流程/模板方法

	public void work() {

		prepared();//课前准备，每个老师都一样

		teaching();//讲课

		end();//结束，每个老师都一样

	}

}

class DBTeacher extends teacher{

	public void teaching() {

		System.out.println("打开oracle");

		System.out.println("写pl-sql");

	}

}

class CTeacher extends teacher{

	public void teaching() {

		System.out.println("打开VM");

		System.out.println("写C指令");

	}

}