JParser

A Java equation parser

Last update: 21:28 GMT 18-12-2012

Currently supported:

• Addition [a+b]
• Subtraction [a-b]
• Multiplication [a*b]
• Division [a/b]
• Exponentiation [a^b]
• Negation [-a]
• Trigonometric functions [sin(a), cos(a), tan(a)]
• Factorial [a!]
• Square/cube root functions [sqrt(a), cbrt(a)]
• Constants [pi, e]
• Custom variables(see usage example in the class documentation)
• Custom functions (see usage example in the class documentation)

Notes:

• All trig functions use degrees, however if you want to use radians simply append an 'r'; e.g. sinr(a), cosr(a)...
• Only integer factorials are supported. If you attempt to use a decimal value, its floor will be used; i.e. 2.5! will equal 2!
• Multiple division is parsed such that "a/b/c" == "(a/b)/c"
• Multiple subtraction is parsed such that "a-b-c" == "(a-b)-c"
• Functions (custom and regular), custom variables and constants are all case-insensitive, i.e. "sin(a)" == "Sin(a)" == "SIN(a)"

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Source code on GitHub