一篇文章带你入门java模板模式

abstract class Action{
	public static final int EAT = 1;
	public static final int SLEEP = 5;
	public static final int RUN = 20;
	public static final int WORK = 30;
	public abstract void eat();
	public abstract void sleep();
	public abstract void run();
	public abstract void work();
	public void order(int flag){
		switch(flag){
			case EAT:
				this.eat();
				break;
			case SLEEP:
				this.sleep();
				break;
			case RUN:
				this.run();
				break;
			case WORK:
				this.work();
				break;
			case EAT+WORK:
				this.eat();
				this.work();
				break;
			case EAT+WORK+RUN+SLEEP:
				this.eat();
				this.sleep();
				this.run();
				this.work();
				break;
			case EAT+RUN+SLEEP:
				this.eat();
				this.sleep();
				this.run();
				break;
		}
	}
}
class Person extends Action{
	public void eat(){
		System.out.print("人吃，");
	}
	public void sleep(){
		System.out.print("人睡，");
	}
	public void run(){
		System.out.print("人跑，");
	}
	public void work(){
		System.out.print("人工作，");
	}
}
class Pig extends Action{
	public void eat(){
		System.out.print("猪吃，");
	}
	public void sleep(){
		System.out.print("猪睡，");
	}
	public void run(){
		System.out.print("猪跑，");
	}
	public void work(){}
}
class Robet extends Action{
	public void eat(){
		System.out.print("机器人吃，");
	}
	public void sleep(){}
	public void run(){}
	public void work(){
		System.out.print("机器人工作，");
	}
}
public class MoBan{
	public static void main(String args[]){
	/*	
人吃，人睡，人跑，人工作，
猪吃，猪睡，猪跑，
机器人吃，机器人工作，
	*/
		Action ren = new Person();
		ren.order(Action.EAT+Action.SLEEP+Action.RUN+Action.WORK);
		System.out.println();
		Action pig = new Pig();
		pig.order(Action.EAT+Action.SLEEP+Action.RUN);
		System.out.println();
		Action robet = new Robet();
		robet.order(Action.EAT+Action.WORK);
	}
}