String Conversion

Is there an easy way to covert String let’s say “x + y”? So that, I could use it as an equation. For example,

text.getText(); // x + y
z = x + y;

Assume that I have declared x and y.

Thank you
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.


Java is a compiled language, and once a program have been compiled it cannot easily understand such 'human readable' expressions.

In scripting languages like Basic, Perl, PHP and JavaScript it can be done easily as those languages are not compiled, instead they are run by being incrementally compiled and executed. The compiler is always present and it is no trouble to have it interpret and execute the string "x + y".

That does not mean it is impossible to write a java program to read and interpret a string like "x + y", it is a stock project for first or second year computing classes.

But not exactly easy (last time I made such a program it ran to about 200 lines of code).

regards JakobA
There are interpretters that will do exactly what your looking for.

One is called Bean Shell for Java:

I've also developed one that I am selling.  First you define your variables and functions in a set of libraries, then you can run the expressions as a string as you are suggesting.
musiccAuthor Commented:
I found one. It is very useful.
Here is the site.
Cloud Class® Course: Amazon Web Services - Basic

Are you thinking about creating an Amazon Web Services account for your business? Not sure where to start? In this course you’ll get an overview of the history of AWS and take a tour of their user interface.

JakobA gave him the answer, and I gave him the best work around, I believe the points should be split.
Not for me please.
PAQed with points refunded (50)

Community Support Moderator

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.