importjava.util.Scanner;// 导入Scanner类publicclassFormulaParser{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);// 创建Scanner对象System.out.print("请输入公式: ");// 提示用户输入公式Stringformula=scanner.nextLine();// 读取用户输入的公式// 调用解析方法parseFormula(formula);...
publicclassFormulaParser{// 词法分析publicList<String>lexicalAnalysis(Stringformula){List<String>tokens=newArrayList<>();// 分解公式// ...returntokens;}// 语法分析publicdoubleparse(List<String>tokens){// 解析和计算公式// ...returnresult;}publicstaticvoidmain(String[]args){Stringformula="2 + 3...
1、首先将所有中间变量都替换成基础数据 FormulaParser的finalExpression方法会将所有的中间变量都替换成基础数据,就是一个递归的做法 1publicclassFormulaParser {2/**3* 匹配变量占位符的正则表达式4*/5privatestaticPattern pattern = Pattern.compile("\\#\\{(.+?)\\}");67/**8* 解析公式,并执行公式计算9...
JbcParser is a mature, well tested Java formula parser for Java programmers! JbcParseris a Math Parser Library for Java. JbcParser evaluates mathematical expressions given as strings at runtime. JbcParser works with JDK 5 and later versions. Java 8 has a change in it’s implementation of Str...
}publicstaticvoidrun(String expr)throwsException {ANTLRStringStreamin=newANTLRStringStream(expr);// 词法分析器FormulaLexerlexer=newFormulaLexer(in);CommonTokenStreamtokens=newCommonTokenStream(lexer);// 语法分析器FormulaParserparser=newFormulaParser(tokens); ...
许多开源的 Java 数学公式解析组件可供使用，其中包括Jep，http://MathParser.org，MathJax，MathDox，FormulaParser等等。
Last commit date Latest commit History 6 Commits nbproject src/cloud/mypattern test/cloud/mypattern LICENSE README.md build.xml README MIT license FormulaParser A Java library to parse Seamly2D/Valentina formulas. A parser that can understand Valentina/Seamly2D formula, as seen, for example in...
anyFormula a 100% java formula parser which supports customized functions and variables. 特征 anyFormula是纯Java实现的公式解析器,具备下列特性: 支持加,减,乘,除,模等算术操作符 支持大于,小于,等于等逻辑操作符 支持下列内置函数 choice nvl to_date ...
bcParser.NETis the math parser component for .NET. It can be used with all .NET languages includingVB.NET and C#(C# Source code is included) bcParserGois the formula parser for Golang. Comes as Go source code that can compile on Windows, Linux, Mac. ...
Download free Java Expression Parser & Evaluator at GitHub Firstof all, it had to understanddecimaland alsonegativevalues. You would be surprised to see how many of the existing solutions do not support that. The reason for this lack of support, by the way, is IMHO the lack of public avai...