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

I would (and have, actually) manually make a parse table and use a simple LR or LALR parser to process it. At a reduction, you can perform the calculations. One advantage to this is that it is easy to modify the "language", or acceptable input.