Javaluator
A java infix evaluator based on "Shunting Yard" algorithm.
Description
Evaluate an arithmetic expression is as simple as:
Double result = new DoubleEvaluator().evaluate("(e^3-1)*sin(pi/4)*ln(pi^2)").
But Javaluator provides you with much more ...
Key features:
- Functions support, including variable argument count.
- Constants support: e, pi, etc ...
- Variables support: Example sin(x) for x = pi/4.
- Highly configurable: Reduce the built-in operator or function sets, define your own brackets.
- Extensible: Define your own grammar, or extends the existing one.
- Localizable: Define localized names for functions or constants.
- Syntax check
- Small footprint: <16kB, no additionnal library required.
- Fully documented
Please visit the project site to learn more : http://javaluator.sourceforge.net
If you use Javaluator in your product, we will be happy to add a link to your product in the Javaluator web site. Send an email to javaluator@astesana.net.
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User Reviews
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The Wikipedia page about operator precedence explains Javaluator uses the standard operator precedence (-2^2=-4). Excel or bash shell script use another convention where -2^2=4. This can be set using the DoubleEvaluator.Style class in version 1.2.1. Support is available through the tickets and the discussion tabs.
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Works great, but it is hard to get help. Maby the javaluator should have had a forum? Minor bug however: -2^2 = -4 (-2)^2 = 4
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works great.
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Thanks javaluator