Evaluate math expression inside a string

Question

I am developing an Android application that I get a String with a mathematical expression that I need to calculate, I did this to convert the letters to the numbers I need, but what is the best way to evaluate this?

Nothing complicated, the formulas are the same: ((A * 2 + B * 3 + C * 5) / 10) + D

EDIT: Just found that the guy, a very simple API, works like a charm http://code.google.com/p/symja/wiki/MathExpressionParser

Answer 1

You want some kind of math parser .

, google: https://www.google.co.uk/#hl=en&gs_nf=1&cp=16&gs_id=7&xhr=t&q=java+math+parser