Java: how to parse double from regex

Question

I have a string that looks like \"A=1.23;B=2.345;C=3.567\"

I am only interested in \"C=3.567\"

what i have so far is:

     Matcher m = Patter         


        

Answer 1

To match any sequence of digits and dots you can change the regular expression to this:

"(?<=C=)[.\\d]+"

If you want to be certain that there is only a single dot you might want to try something like this:

"(?<=C=)\\d+(?:\\.\\d+)?"

You should also be aware that this pattern can match the 1.2 in ABC=1.2.3;. You should consider if you need to improve the regular expression to correctly handle this situation.