string.replaceAll to replace occurrences

Question

I need to replace a string:

"abc.T.T.AT.T"

to a string with all single T to be replaced by TOT like

"abc.TOT.TOT.AT.TOT"

strings.replaceAll not working for this.

Answer 1

look around will solve your problem:

s.replaceAll("(?<=\\.|^)T(?=\\.|$)", "TOT");

if you do:

String s = "T.T.T.AT.T.fT.T.T";
System.out.println(s.replaceAll("(?<=\\.|^)T(?=\\.|$)", "TOT"));

output would be:

TOT.TOT.TOT.AT.TOT.fT.TOT.TOT