Power characters in Java

I'm having some problems with text rendering on a JTextField. I would like to print in this field a mathematic expression, with the exponents of powers and the indexes of roots should go to the top of the line, like every power you've ever seen. Besides, I would like the root symbol to extend over the following terms. How can I do that?

Solution

Well with a JLabel you can use an HTML superscript but JTextField does not do HTML. So if you don't need to take input, use a JLabel. It is as simple as "<html><sup>123</sup></html>".

You can still display some characters as superscript in a JTextField through some special UTF characters, the locations of which are:

2, 3, 1 in Latin-1 Supplement (\u00B2, \u00B3 and \u00B9).
0, 4-9 and some symbols in Superscripts and Subscripts.
Wikipedia has a pretty complete looking list of other superscripts and subscripts at Unicode subscripts and superscripts#Other superscript and subscript characters.

Some of what you are asking (like about extending the root symbol) seems a little too much to ask. A JTextField can't do that. I am sure there would be TeX/LaTeX/etc typesetting libraries for Java though if you want real mathematical notation.