Given the following strings (stringToTest):
G2:7JAPjGdnGy8jxR8[RQ:1,2]-G3:jRo6pN8ZW9aglYz[RQ:3,4]
G2:7JAPjGdnGy8jxR8[RQ:3,4]-G3:jRo6pN8ZW9aglYz[RQ:3,4]
And the Pattern:
Pattern p = Pattern.compile("G2:\\S+RQ:3,4");
if (p.matcher(stringToTest).find())
{
// Match
}
For string 1 I DON'T want to match, because RQ:3,4 is associated with the G3 section, not G2, and I want string 2 to match, as RQ:3,4
is associated with G2 section.
The problem with the current regex is that it's searching too far and reaching the RQ:3,4
eventually in case 1 even though I don't want to consider past the G2 section.
It's also possible that the stringToTest might be (just one section):
G2:7JAPjGdnGy8jxR8[RQ:3,4]
The strings 7JAPjGdnGy8jxR8
and jRo6pN8ZW9aglYz
are variable length hashes.
Can anyone help me with the correct regex to use, to start looking at G2 for RQ:3,4
but stopping if it reaches the end of the string or -G (the start of the next section).
You may use this regex with a negative lookahead in between:
G2:(?:(?!G\d+:)\S)*RQ:3,4
RegEx Details:
G2:
: Match literal textG2:
(?:
Start a non-capture group(?!G\d+:)
: Assert that we don't have aG<digit>:
ahead of us\S
: Match a non-whitespace character
)*
: End non-capture group. Match 0 or more of thisRQ:3,4
: Match literal textRQ:3,4
In Java use this regex:
String re = "G2:(?:(?!G\\d+:)\\S)*RQ:3,4";