JEP是Java expression parser的简称，即java表达式分析器，Jep是一个用来转换和计算数学表达式的java库。通过这个程序包，用户可以以字符串的形式输入一个、任意的公式，然后快速地计算出结果。Jep支持用户自定义变量、常量和函数。包括许多常用的数学函数和常。(Jep is a Java library for converting and calculating mathematical expressions. Through this package, the user can enter a, arbitrary formula in the form of a string, and then quickly calculate the results. Jep supports user defined variables, constants, and functions. It includes many common mathematical functions and constants.)