How can I convert a Stream of Strings to Stream of String pairs?

Question

I want to take a stream of strings and turn it into a stream of word pairs. eg:

I have: { \"A\", \"Apple\", \"B\", \"Banana\", \"C\", \"Carrot\" }

Answer 1

Here's a minimal amount of code that creates a List> of the pairs:

List> pairs = new LinkedList<>();
testing.reduce((a, b)-> {pairs.add(Arrays.asList(a,b)); return b;});