How to capitalize the first letter of word in a string using Java?

Question

Example strings

one thousand only
two hundred
twenty
seven

How do I change the first character of a string in capital letter and not change

Answer 1

My functional approach. its capstilise first character in sentence after whitescape in whole paragraph.

For capatilising only first character of the word just remove .split(" ")

           b.name.split(" ")
                 .filter { !it.isEmpty() }
                 .map { it.substring(0, 1).toUpperCase() 
                 +it.substring(1).toLowerCase() }
                  .joinToString(" ")