Question

I need to check if a string contains any symbols other than a space. I cant check with

      String.length() > 0

or

      String.equals("") 

since spaces are considered as characters. How can I find out whether a java String contains other characters (letters, symbols, numbers, whatever) ?

Answer 1

You can use

String.trim().equals("")

If String only contains spaces they all will be removed by trim() before checking for equality