java抽象繼承-模板方法

//模板方法：步驟提前設計好，用的時候只需要改步驟內容
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("整理資料");
		System.out.println("開啟投影儀");
	}
	
	public abstract void teaching();//抽象方法，子類需重寫
	
	public void end() {
		System.out.println("關閉投影儀");
		System.out.println("帶走資料");
	}
	//老師的工作流程/模板方法
	public void work() {
		prepared();//課前準備，每個老師都一樣
		teaching();//講課
		end();//結束，每個老師都一樣
	}
}

class DBTeacher extends teacher{
	public void teaching() {
		System.out.println("開啟oracle");
		System.out.println("寫pl-sql");
	}
}

class CTeacher extends teacher{
	public void teaching() {
		System.out.println("開啟VM");
		System.out.println("寫C指令");
	}
}