Check if String array of digits contains symbol

Question

Got String[][] arr which contains only digit in String format.

 if (array[i][j].equals("[a-zA-Z]+")){ - not help

How to check if this arr contains symbol ?

Answer 1

 mystring.matches("\\d+");

Returns true when all the chars are digits. This won't break even if the number is greater than the limit of int .

You can see some other examples here

Determine if a String is an Integer in Java

Answer 2

You can check each cell in the array for its ascii value.

for exampe: if its between 65-90 its a capital letter

http://www.asciitable.com/