java抽象继承-模板方法

//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");
	}
}