Check for the Numeric Values

Question

Hi All,
I am new to java . Please help me the this problem .
I have a string variable and which store the values like "ABC" or "123" but i need to check if the variable values are like "123" then process ..other wise ..exclude that( like "ABC" ....).
Thanks in Advance ..
prakash

Answer 1

JosAH wrote:
BIJ001 wrote:
While a good and straightforward solution, it might incur some run-time penalty (exception-object-creation, exception handling overhead).Indeed, but what would be the runtime overhead for a RE that exactly matches the range of valid ints (or longs)?Assuming a reasonably well-written regex, matching only valid {color:000080}int{color}s shouldn't be significantly slower than using "\\d+". On the other hand, throwing and catching exceptions is hideously expensive. If you expect to get a lot of invalid strings, you're definitely better off validating them with a regex before calling Integer.parseInt(). But none of this really matters unless you're processing large numbers of strings in a tight loop.