Replace all tags except one with regexp in Java

I have the following questions I want to delete all substrings starting with < And ends with > except substring < back >

Example: < apps > < Max > < down > < capital >... Should be deleted, but not < back >

I'm sure this applies to regexp and string Replace (), but I don't know how

At present, I have thought of this:

line = line.replaceAll("<[^<]*>","");

The problem is that this will also delete < back > - substring!

I hope one of you knows the solution

Thanks for your help!

Solution

You can use (?! < back >) < [^ <] * >, line = line replaceAll(“(？！< back>)< [^<] *>”,“”);

(?! < back >) (negative forward looking) does not match the label < back >

RegEx Demo