Question

I am trying to write a function that takes some strings and does something with them.

The only thing I’m going to do that the set of strings is loop over them. Right now I end up with an awkward construct along the lines of

public void foo(String[] myStrings){
    foo(java.util.Arrays.asList(myStrings));
}

public void foo(Iterable<String> myStrings){
    for(String i : myStrings){
        bar(i);
    }
}

which feels redundant since

for(String i : myStrings){
    bar(i);
}

would be perfectly valid code for myStrings of type String[].

Is there a class that I can have foo accept which will allow both collections and arrays?

Answer 1

See Why is an array not assignable to Iterable?

Short answer: no. Array types are synthetic code, as I understand it, and thus do not implement Iterable or any other types. You need to provide an overloaded method or require clients to call Arrays.asList at the call site.