模板设计模式(Template )
abstract class Action{ // 定义一个行为类
public static final String WORK = "work";
public static final String SLEEP = "sleep";
public static final String EAT = "eat";
public abstract void eat();
public abstract void sleep();
public abstract void work();
public void command(String str){
switch(str){
case "work":
this.work();
break;
case "sleep":
this.sleep();
break;
case "eat":
this.eat();
break;
}
}
}
class People extends Action{
public void sleep(){
System.out.println("人正在睡觉");
}
public void eat(){
System.out.println("人正在吃饭");
}
public void work(){
System.out.println("人正在工作");
}
}
class Pig extends Action{
public void sleep(){
System.out.println("猪正在睡觉");
}
public void eat(){
System.out.println("猪正在吃饭");
}
public void work(){ }
}
class Robot extends Action{
public void sleep(){ }
public void eat(){
System.out.println("机器人正在补充能量");
}
public void work(){
System.out.println("机器人正在工作");
}
}public class Test{
public static void main(String args[]){
fun(new People());
fun(new Robot());
}
public static void fun(Action act){
act.command(act.WORK);
act.command(act.SLEEP);
act.command(act.EAT);
}
}