a question of using regular expression

[Stephen]

I am now using org.apache.regexp as the regular expression library in
my Java code. I meet a difficulty in implementating the following
regular expression, I don't know how to describe it (because of my
poor English), so I take an example:

String sText0 = "good morning!";
String sText1 = "morning! you are very good!";

RE r = new RE("???????????"); // I have no idea in this

actually, I just want to get the string which has string "good" at the
start. Therefore, in this case, sText0 can be got only. How can I do
this? Thanks!

Stephen