Regex str.matches failure

Programming Questions

hatsaresi..

in Programming Questions • 1 year ago

I am trying to check if a string matches the condition of having between 1-4 digits followed by a comma and 1-4 digits, for example: 0,0 = true, 1234,6 = true, 0,0, = false.

if (myString.matches("\\d{1,4},\\d{1,4}")) {
    trimmedString = trim(myString);
}
else {
    trimmedString = "0";
    println("Bad data detected: "+myString);
}

this code always seems to output Bad data detected: myString. even when the values should be valid, like 0,0. Thanks for any help.

Replies(2)

trzewiczek

The code looks fine and I checked it on my computer and it worked with no problems - it matches 1-4 digits, comma and 1-4 digits.

Is the myString value correct in the console when you print it right before the if statement? Maybe the string contains some whitespaces? Then you should probably change the regexp to:

"\\s*\\d{1,4},\\d{1,4}\\s*"

That would make sens, why you trim it in the if body ;)

hatsaresi..

Re: Regex str.matches failure

1 year ago

Yep, that works. Thanks!

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