Regex Not Matching Nested Brackets in Java - implementing Complex Expressions
I'm collaborating on a project where Quick question that's been bugging me - I'm currently trying to extract content from a string that includes nested brackets using regex in Java, but I'm hitting a wall....... The string format looks something like this: `"text [nested [content]] more text"`. I want to match the entire content within the outermost brackets, including any nested brackets. I've been experimenting with the following regex pattern, but it doesn't seem to work as intended: ```java String regex = "\[(.*?)\]"; ``` When I run this code: ```java String input = "text [nested [content]] more text"; Pattern pattern = Pattern.compile(regex); Matcher matcher = pattern.matcher(input); if (matcher.find()) { System.out.println(matcher.group(1)); } ``` I get `nested [content]` as the output, which is not what I want. I need the full content including the nested brackets, so I was hoping to adjust my regex to do that. I've also tried using a more complex pattern with the `(?R)` recursion feature that some regex engines support, but it throws a `PatternSyntaxException: Illegal repetition` behavior in Java. I suspect that Java's regex implementation doesn't support recursion. Is there a way to capture all content including nested brackets without running into this scenario? I would appreciate any insights or alternative approaches to handling this question efficiently, especially given that the string may contain multiple nested levels. Thanks in advance! Any ideas what could be causing this? I'm working on a web app that needs to handle this. I'd really appreciate any guidance on this. I'm on Windows 10 using the latest version of Java. Thanks for any help you can provide! I'm working on a CLI tool that needs to handle this. Hoping someone can shed some light on this.