Method for Evaluating Math Expressions in Java
When working with mathematical calculations in Java, evaluating complex expressions can be a challenge. One approach is to utilize a dedicated library such as exp4j, which provides a robust solution for expression evaluation.
Exp4j is a widely used expression evaluator that adopts the Dijkstra's Shunting Yard algorithm. It offers several advantages:
<code class="java">Calculable calc = new ExpressionBuilder("3 * sin(y) - 2 / (x - 2)") .withVariable("x", varX) .withVariable("y", varY) .build() double result1=calc.calculate();</code>
For API version 0.4.8 and above:
<code class="java">Expression calc = new ExpressionBuilder("3 * sin(y) - 2 / (x - 2)") .variable("x", x) .variable("y", y) .build(); double result1 = calc.evaluate();</code>
Custom Functions Support:
Exp4j allows for the integration of custom functions, providing additional flexibility in your expression evaluations.
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