JEP - Java Mathematical Expression Parser
JEP is a Java API for parsing and evaluating mathematical expressions. With this library you can allow your users to enter an arbitrary formula as a string, and instantly evaluate it. JEP supports user defined
Tutorial Details:
Features
Small size (only 75KB as jar archive)
Supports Boolean expressions (!, &&, ||, <, >, !=, ==, >=, and <=)
Fast evaluation (the expression can be evaluated quickly for different variable values)
Includes common math functions
Extendable through user defined functions
Predefined constants such as 'pi' and 'e'
Support for strings, complex numbers, and vectors
Support for implicit multiplication (allows use of expressions such as "3x" instead of "3*x")
Allows choice between declared and undeclared variables
Java 1.2 compatible (cross-compiled with Sun JDK 1.2.2)
Supports Unicode characters (including Greek symbols)
Includes JavaCC grammar from which the main classes are generated
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