How can I represent powers and exponents such as Unicode character 'superscript two" in FXML/XML?

Question

My FXML file is formatted in UTF-8. This is the relevant part of code:

<?xml version="1.0" encoding="UTF-8"?>

<Text fx:id="totalSqMGlassText" layoutX="573.0" layoutY="547.0" strokeType="OUTSIDE" strokeWidth="0.0" text="&#x0xB2;" AnchorPane.bottomAnchor="57.0" AnchorPane.leftAnchor="573.0" />

I checked the UTF-8 code for second power here and here. Found this information about Unicode character "superscript two", i.e. the second power: "UTF-8 (hex) - 0xC2 0xB2 (c2b2)". I also read this question and answer on stackOverflow. So I tried with these: &#x0xC2; e&#x0xB2; 슲 &#c2b2; and even this :) &#c2 b2;

If I use standard text everything works fine but if I try with the aforementioned special character and escaping I receive this exception:

javafx.fxml.LoadException: 

... Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[142,121] Message: The character reference must end with the ';' delimiter.

or this

Caused by: javax.xml.stream.XMLStreamException: ParseError at

[row,col]:[142,118] Message: A decimal representation must immediately follow the "&#" in a character reference.

Each time I used semicolon (once I tried even without semicolon and with two semicolons :)). I think the second exception is obvious. In my desperation I simply tried few times to enter the right escaping blindly so I used escaping for decimal representation instead for hexadecimal (correct me if I'm wrong). So my question is:

Do you know what am i doing wrong and what is the right escaping and code in that situation? And also what is the right way to represent powers and exponents through FXML/XML in general? Thank you in advance.

Answer 1

Replace &#x0xB2; with ² for Unicode SUPERSCRIPT TWO (²).