public int readMenu(){
		int menu = 0;
		while(true){
			if(in.hasNextInt()){
				menu = in.nextInt();
				if(menu >= 1 && menu <= Menu.values().length){
					break;
				}
			}
			out.println("ȷ룺");
			in.next();
		}
		return menu - 1;
	}