regex match and replace words

Question

I have a date type string yyyy-MM-ddTHH:mm:ss (2018-04-18T00:00:00)

I want to match : and replace it with %3a match - replace it with %2d

this my Regexp DEMO: https://regex101.com/r/rqpmXr/11

my output 2018%3a04%3a18T00%3a00%3a00

my expected output need to be like that 2018%2d04%2d18T00%3a00%3a00

Answer 1

String date = "2018-04-18T00:00:00";
date = date.replace("-","%2d").replace(":","%3a");

I think it's much easier to use String.replace() method for your case.