Pfthb

I need to replace "《br》" to "<br>".

replaceAll does not work, but if I do it in the variable window when debugging ... it works!

Same with indexOf("《") , returns -1 but using the variable window returns 12

How can I replace it?

So the question is, how to make it work in the code

As String is immutable you are not changing original value of text variable. replaceAll creates new String with correct value and you have to assign it to variable to use it.

Reference of usage can be found here with some more explanation, but basic usage is:

String originalText ="some text with letters to replace"; 
String newTextWithReplacedValues = originalText.replaceAll("a","e");//replaces all occurrences of "a" to "e" 
System.out.println(newTextWithReplacedValues); 

You can see it working in the debugger since text.replaceAll(...) returns proper value. It is just not changing original text variable.

For me replacing just works fine.

public class Application 
 public static void main(String args) 
 String s = "《br》";
 s = s.replace("《", "<").replace("》", ">");
 System.out.println(s);
 

《 may not be a single character though since '《' gives an error but "《" works.

This is the Character documentation:

The set of characters from U+0000 to U+FFFF is sometimes referred to
as the Basic Multilingual Plane (BMP). Characters whose code points
are greater than U+FFFF are called supplementary characters. The Java
platform uses the UTF-16 representation in char arrays and in the
String and StringBuffer classes. In this representation, supplementary
characters are represented as a pair of char values, the first from
the high-surrogates range, (uD800-uDBFF), the second from the
low-surrogates range (uDC00-uDFFF).