This week's book giveaway is in the Servlets forum.
We're giving away four copies of Murach's Java Servlets and JSP and have Joel Murach on-line!
See this thread for details.
The moose likes Java in General and the fly likes String maths Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of Murach's Java Servlets and JSP this week in the Servlets forum!
JavaRanch » Java Forums » Java » Java in General
Bookmark "String maths" Watch "String maths" New topic

String maths

Nikos Stavros
Ranch Hand

Joined: Feb 24, 2006
Posts: 243

I want the user to input some text ie "2 * 2 / 4 + 1" and the program to do the maths. Is there any open source code to do this or do I need to construct a series of case conditions

Jesus lives
john guthrie
Ranch Hand

Joined: Aug 05, 2002
Posts: 124
you might look at ANTLR vice a series of case conditions
Edwin Dalorzo
Ranch Hand

Joined: Dec 31, 2004
Posts: 961
I recently replied a post like this. I that case I suggested the use of BeanShell. It is an open source scripting language and it comes with an expression evaluator. You simply pass an String containg the expression and get the result.

Another option would be to use the new scripting powers of JDK6. Take a look at it.

I hope this helps!
I agree. Here's the link:
subject: String maths
Similar Threads
Maths behind Programming Languages
MS Math
Other Shuffling question
Java does not seem to calculate doubles accurately
Using forEach to display values from a Map