Use character wrapper to code a replace a letter in a string with a new letter keeping the original case

Question

Trying to figure out how to use character wrapping to mutate a string based on user input. If string is \'Bob loves to build building\' and user chooses to replace all letter B/

Answer 1

I think there is a String class built-in replace function.

String text = "Bob loves to build building";
text = text.replace("B","T").replace("b","t");

something like this ?