As the title indicates, please, how do I capture unpaired brackets or parentheses with regex, precisely, in java, being new to java. For instance, supposing I have the string below;
Programming is productive, (achieving a lot, and getting good results), it is often 1) demanding and 2) costly.
How do I capture 1) and 2). I have tried:
([^\(\)][\)])
But, the result I am getting includes s) as below, instead of 1) and 2):
s), 1) and 2)
I have checked the link: Regular expression to match balanced parentheses, but, the question seem to be referring to recursive or nested structures, which is quite different from my situation. My situation is to match the right parenthesis or right bracket, along with any associated text that does not have an associated left parenthesis or bracket.
Maybe,
\b\d+\)
might simply return the desired output, I guess.
Demo 1
Another way is to see what left boundary you might have, which in this case, I see digits, then what other chars we'd have prior to the closing curly bracket, and then we can design some other simple expression similar to:
\b\d[^)]*\)
Demo 2
Test
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegularExpression{
public static void main(String[] args){
final String regex = "\\b\\d[^)]*\\)";
final String string = "Programming is productive, (achieving a lot, and getting good results), it is often 1) demanding and 2) costly.\n\n"
+ "Programming is productive, (achieving a lot, and getting good results), it is often 1a b) demanding and 2a a) costly.\n\n\n"
+ "Programming is productive, (achieving a lot, and getting good results), it is often 1b) demanding and 2b) costly.\n\n"
+ "It is not supposed to match ( s s 1) \n";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
Output
Full match: 1)
Full match: 2)
Full match: 1a b)
Full match: 2a a)
Full match: 1b)
Full match: 2b)
Full match: 1)
RegEx Circuit
jex.im visualizes regular expressions:
