I am new to JAVA coding, and I am trying to learn how to use regex.

I am new to JAVA coding, and I am trying to learn how to use regex.

On discord automod saw this getting triggered and then went to regex101 and got an error even with “Unicode” Label. Asked ChatGPT and it gave me an explanation that doesn’t have nothing to do with the face emoji that was triggered in the first place. So can anyone say what it exactly triggers?[text]([[enter image description here](https://i.sstatic.net/wtPhRXY8.jpg)](https://i.sstatic.net/TSvFYLJj.jpg))

I have file name as GKL_0456_CFT_CF_20240226.dat and JQBF305_0556_CFT_TF_20240225_d.dat
I want to extract date string from both file name.

I am giving the code and I am not getting true even I use the correct regular expression. Please correct me and explain me clearly as I might not looking at the actual problem in overlook.

I am trying to write a regular expression to identify all the consecutive sequences of zeroes between 1 in a binary string. I am then trying to iterate over these matches to identify the longest such subsequence of 0.
Following are examples for problem statement:

I am working on a Java application that processes strings. I need to mask the content of a specific field in these strings. The challenge I’m facing is that this field sometimes contains commas, which interferes with my current masking pattern. Here is what I have so far:

I am trying to perform a regex search on this date-timestamp but it is not working.

Is there anything in java that does the opposite of regular expressions?

So I’m trying to get the coordinates from an GPX file via regex.