How to calculate String(Expression) into Formula in servlets

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3 total messages Started by Ashwin Mon, 02 Dec 2002 01:42

#735

Author: Ashwin
Date: Mon, 02 Dec 2002 01:42

9 lines
1324 bytes

 Anyone can help me how to calculate string(Expression) into formula.

I am getting one Formula from Database as a String.

That string like" x+2*y".
I have the values of these x and y variables. But i am unable to pass these
values into this formula and i am unable to split that formula also.

Can anyone give the code i thankfull to them.

Re: How to calculate String(Expression) into Formula in servlets

#740

Author: John McGrath TeamB
Date: Wed, 04 Dec 2002 18:48

25 lines
1714 bytes

On Mon, 2 Dec 2002 09:42:36 +0800, Ashwin wrote:

> Anyone can help me how to calculate string(Expression) into formula.
> 
> I am getting one Formula from Database as a String.
> 
> That string like" x+2*y".
> I have the values of these x and y variables. But i am unable to 
> pass these values into this formula and i am unable to split that
> formula also.
> 
> Can anyone give the code i thankfull to them.

There is nothing in the standard Java classes for handling this.  
However, if you search Google with "Java expression evaluator", you 
will find plenty of packages that do.

-- 
Regards,

John McGrath [TeamB]

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Re: How to calculate String(Expression) into Formula in servlets

#741

Author: Shankar Unni
Date: Thu, 05 Dec 2002 19:29

7 lines
1423 bytes

John McGrath [TeamB] wrote:

> There is nothing in the standard Java classes for handling this.  
> However, if you search Google with "Java expression evaluator", you 
> will find plenty of packages that do.

Try http://www.beanshell.org.

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