In C I've done this sort of thing

```
enum { USE_COKE = 1,
        USE_PEPSI = 2,
        USE_JUICE = 4,
        USE_WATER = 8 };

 int makeDrink(int flags);

 //...

 int rcode = makeDrink(USE_COKE | USE_JUICE | USE_WATER);

```

I know this is pretty standard, it's also used in `iostream` for instance. I'm wondering how to translate this design pattern into Java or OOP? I'm *pretty* sure polymorphism is not the way to go here since it'd be better for my code to have an `if(flag_is_set)` block than rewrite much of the routine. Is there a utility `Flags` class, or a preferred way to do this using a configuration object, or an `enum`, or a bunch of ints, etc.