public void setFilter()
	{
		try{
			System.out.println("--------------------------------------------------------");
			System.out.println("Hotel Ordering System - Set Filter");
			System.out.println("--------------------------------------------------------");
			System.out.println("1. ENTREE");
			System.out.println("2. MAIN_COURSE");
			System.out.println("3. SIDE_DISH");
			System.out.println("4. DESERT");
			System.out.println("5. DRINK");
			System.out.println("A. All (remove filter)");
			System.out.println("--------------------------------------------------------");
			System.out.print("Enter your option (1-5 or A): ");
			String ch = keyboard.nextLine();
			switch(ch){
				case "1":
				hos.setFilter(Category.ENTREE);
				break;
				case "2":
				hos.setFilter(Category.MAIN_COURSE);
				break;
				case "3":
				hos.setFilter(Category.SIDE_DISH);
				break;
				case "4":
				hos.setFilter(Category.DESERT);
				break;
				case "5":
				hos.setFilter(Category.DRINK);
				break;
				case "A":
				case "a":
				hos.removeFilter();
				break;
				default: 
				throw new Exception("Please enter valid input");
			}
			System.out.println("Filter has been saved.");
		}catch(Exception e){
			System.out.println(e.getMessage());
			System.out.print("Do you want to set filter again?(yes): ");
			String input = keyboard.nextLine();
			if(input.equalsIgnoreCase("yes")){
				setFilter();
			}
		}
	}