If you use String.split you create whole array in memory.
Consider using Pattern.splitAsStream to process one word at a time.

the same as mine, but:

• trim also should be applied to each word to ignore extra spaces inside phrase

very beautiful solution

Almost like mine, but I didn't extract additional method and trimmed words as well.

I forgot about this :P

XD

what the heck

downCaseLetterInOddPositionAndUpCaseLetterInEvenPosition(s);