Software:Exp4j
From HandWiki
Stable release | 0.4.3
/ 2014-10-10 |
---|---|
Written in | Java |
Type | Math |
License | Apache License 2.0 |
Website | www |
exp4j is a small Java library for evaluation of mathematical expressions.[1] It implements Dijkstra's Shunting-yard algorithm to translate expressions from infix notation to Reverse Polish notation and calculates the result using a simple Stack algorithm.
Features
- Variables can be used in expressions
- exp4j comes with a set of common built-in functions
- Users can create and use their own custom operators
- Users can create and use their own custom functions
License terms
exp4j is released under the terms of the Apache License 2.0
Examples of usage
Calculating the result of [math]\displaystyle{ 3 * \frac{\sin{(\pi)} - 2}{e} }[/math] can be done in the following way:
Expression e = new ExpressionBuilder("3 * (sin(pi) - 2 )/ e") .variables("pi", "e") .build() .setVariable("pi", Math.PI) .setVariable("e", Math.E); double result = e.evaluate();
See also
- mXparser - Mathematical Expressions Parser / Evaluator
References
Original source: https://en.wikipedia.org/wiki/Exp4j.
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