I reading the "Learning Spark" book and for example 5-14, I noticed that a JavaPairRDD<String[]> was declared. I'm pretty sure that JavaPairRDD's can only take Tuple2s (i.e. for Key and Value) but I wasn't sure if there was some weird implicit conversion going on from String[] to Tuple2 somehow.
I can't find any other examples of this online except for this exact example.
Here's a link to the page in the book.