Search for the only unknown in the equation

Question

I need a library to be able to analyze the equation and give me a result that gives input.

For example, something like this:

String equation = "5 = 6 / z"; EquationSolver solver = new EquationSolver(equation); double result = solver.getResult(); System.out.println("result: " + result); 

And evaluated by: 6/5

Is there any library for java that can do this for me? Basically, I need a program to isolate one unknown variable in an arbitrary equation ...

Thank you Thomas

Answer 1

What you are looking for is a computer algebra system.

Wikipedia lists some options. I would take a look at the Java Algebra System

Answer 2

For this you need a Java expression library. I found MVEL to be a good Java expression library

You can check this link for other java expression libraries. http://java-source.net/open-source/expression-languages

Answer 3

Take a look at JPELite.

JEPLite: java expression parser enumerated .

Answer 4

Not sure if you will find one that will be easy to use, but http://jscl-meditor.sourceforge.net/#mozTocId312653 seems to provide a solution to the polynomials: let me know that this works for you (and how! )

Alternatively, JScience can do what you want.