See the discussion of "enhanced for statement" in
http://java.sun.com/features/2003/05/bloch_qa.html.

Here's an authoritative explanation:

<http://java.sun.com/j2se/1.5.0/docs/guide/language/foreach.html>

I knew it was new in Java 1.5, so I googled for what's new in Java
1.5., and there it was; "for" might be a difficult word to find.

The mere answer is that

    for (c o : m()) { ... }

iterates over a collection of values returned by the method m, binding
o to each of them in turn. The collection can be an array or a
Collection.

I recommmend spaces around the colon.

That's the syntax for the 'foreach' style for loop.

somemethod() returns a Collection (or other Iterable) or an array. classname
is the name of the class contained in such Collection or array. obj is the
loop variable. The code executes the body of the loop once for each element
in the array, supplying the current element in the variable obj.

-- Adam Maass