public class Demo {
 public static void main(String[] args) {
 Game g1 = new LOL();
 Game g2 = new CF();
 g1.playGame();
 g2.playGame();
 }
}

abstract class Game{
 protected void init(){
 System.out.println("初始化游戏并登陆游戏。。。");
 }
 public abstract void play();
 protected void end(){
 System.out.println("结束游戏并退出登录。。。");
 }
 public void playGame(){
 init();
 play();
 end();
 }
}

class LOL extends Game{
 public void play() {
 System.out.println("玩英雄联盟游戏");
 }
}

class CF extends Game{
 public void play() {
 System.out.println("玩创越火线游戏");
 }
}