Comments (3)
You could always check whether the String
only contains digits in your preprocessing logic, something like:
private static final Pattern NUMBERS_ONLY_PATTERN = Pattern.compile("^(+|-)?[0-9]+$");
String expression = "5*9";
if (NUMBERS_ONLY_PATTERN.matcher(expression.trim()).matches()) {
// Contains only numbers.
} else {
// Contains also other characters.
}
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I don't think EvalEx really has a utility function for that which is exposed/public, and I'm unsure whether it should have it. Yes, it's of course part of the functionality, but defining whether your expression needs parentheses or not, should be part of your logic, in my opinion.
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I agree, of course I can write this part of the code myself. I was just seeing the internal method isNumber(...) which could be made public.
Anyhow, thanks for your reply!
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Related Issues (20)
- OutOfMemoryError: for wrong expression with 2 dots HOT 1
- Support arrays as function parameters HOT 7
- Equality depends on input type in 3.1.0
- problem with placeholder HOT 1
- Add module-info (or at least Automatic-Module-Name) HOT 2
- SQRT function doesn't work HOT 3
- With introduction of null, it's better to allow short circuiting (lazy evaluation) for those boolean operators HOT 4
- Equals/NotEquals operator is now sometimes showing inconsistent behavior HOT 1
- Broken boolean expression evaluation in version 3.1.0
- Allow Java arrays as input parameters
- Restore compatibility with Java 8 HOT 2
- Determine evaluation result type without evaluating HOT 2
- Java exception generated when trying to calculate expressions (it worked before with the original EvalEX library in the previous GitHub) HOT 2
- Can arrayJson filtering be supported? HOT 6
- Add a configurable locale to the configuration
- New Player Guidebook Naming rules HOT 1
- Incorrect behavior of ‘==’ operator in IF() expression for Array typed variable
- Management of the exception IndexOutOfBoundsException for Array variables
- Definition domain of the ACOS function
- does not evaluate if expression operand has a period, hyphen seperater HOT 1
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