Converting inserted string to a compilable expression

Question

I\'m somehow new to Java so my question can seem trivial, however i cannot find an answer to it anywhere in my books.

I want to initiatie a dialog with a user in which h

Answer 1

It isn't so hard to parse them yourself, but if you need fast and probably accurate result, you can use one of the existing libraries to parse arithmetic expressions, like JEP or perhaps that Simple Parser for Arithmetic Expressions.

See the Jep Console for a sample. It looks like Jep is payware. It might not be a problem, otherwise as I wrote, you should be able to find a number of equivalent libraries.