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Strings of Numbers
Posted by Matt Gerrans on January 25, 2002 at 2:13 PM
> Is there a way one could check whether a value in a text file is a String or an Integer??????
> ex: is this possible ??
> If(val == String)
Well, by definition, all values in text files are strings, but if you want to see if a particular string contains only digits, you could simply try to convert it to an int; if that fails, an exception is thrown. For example:
// Assume you've already read the String s from the file:
int value = Integer.parseInt( s );
// Now, do something interesting with the int value.
catch( NumberFormatException nfe )
// Do something interesting with the string value.