Is(are) there any static method(s) available for number checking?

I want to check some texts entered by user whether it is a number or not but I want to do it with a static method which takes the texts as parameter returns a boolean true or false value. So if anyone has any solution plz help!!!

I want to check some texts entered by user whether it
is a number or not but I want to do it with a static
method which takes the texts as parameter returns a
boolean true or false value. So if anyone has any
solution plz help!!!How does the user enter the text? It's much better to e.g. limit the possibility to enter illegal characters.
Kaj

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