How do I use regular expressions to get a second matcher in Java?

See English answers > match at every second occurrence

VA-123456-124_VRG.tif

I tried this:

Pattern mpattern = Pattern.compile("-.*?_");

But I got 123456-124 of the above regular expression in Java

I just need 124

How can I do this?

Solution

I will use a formal pattern matcher here, as specific as possible I will use this mode:

^[^-]+-[^-]+-([^_]+).*

Then check the first capture group for possible matches This is a valid code fragment:

String input = "A-123456-124_VRG.tif";
String pattern = "^[^-]+-[^-]+-([^_]+).*";
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(input);

if (m.find()) {
   System.out.println("Found value: " + m.group(1) );
}

124

By the way, a liner can also work here:

System.out.println(input.split("[_-]")[2]);

However, it should be noted here that it is not very specific and may fail due to your other data