[英]Regular expression for arithmetic expression
I,m trying to write a regex to check if the given string is like a + b, 2 + a + b, 3 + 6 * 9 + 6 * 5 + a * b, etc... 我正在尝试编写一个正则表达式来检查给定的字符串是否像a + b,2 + a + b,3 + 6 * 9 + 6 * 5 + a * b等...
Only + and * operators. 仅+和*运算符。
I tried 我试过了
if (str.matches("(\\\\d|\\\\w \\\\+|\\\\*){1,} \\\\d|\\\\w"))
Unfortunately it only handles cases like 3 * 7 ... (numeric * numeric). 不幸的是,它仅处理3 * 7 ...(数字*数字)之类的情况。
Waiting for your answers, thanks for reading me. 等待您的答案,感谢您的阅读。
This will handle cases of simple and chained calculations 这将处理简单和链式计算的情况
[0-9A-Za-a]*( ){0,}([+-/*]( ){0,}[0-9A-Za-a]*( ){0,})*
This would match, for example 例如,这将匹配
(You can change the operators you want by updating [+-/*]
) (您可以通过更新
[+-/*]
来更改所需的运算符)
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