Java math expression parser that can take complex numbers as a variable?

Question

I am writing a program in Processing that transforms complex numbers. However, I want to have a method of taking an input string and calculating the transformation using a compl

Answer 1

Here is a link to a straight-forward math expression parser (64 lines): http://javadots.blogspot.com/2008/11/arithemetic-expressions-solver-in-64.html

Tweaking it to support your needs should not be too difficult