String manipulation first character and number

Question

I have a string "shyam123-rohan-jack75"

I want to have output like "S123-r-j75"

Basically if, Print the first character of string and if there is a intiger part in a word we have to print it as well.

Answer 1

Using String#replaceAll :

String input = "shyam123-rohan-jack75";
input = input.replaceAll("\\b([A-Za-z])[A-Za-z]*", "$1");
System.out.println(input);

This prints:

s123-r-j75

This regex approach works by matching and capturing the first alphabet character following a word boundary. It also matches all following alphabet characters (but not numbers), replacing with just the first captured alphabet.