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ahh thank you,, got it,,
(!s.matches("[a-zA-Z]+") did the trick,,

hope i can get the next part done :D

my bad for crossposting,, but i didnt think i would get a reply, wont happen again,
ok so i put

if (s.matches("[a-zA-Z]"))
{
output.print("The string must consist of letters!");
}

but...

my program has to output and evaluate a string,

heres 3 examples of how it is supposed to run,

eg.1 (no string entered)
java Word
Usage: java Word <string>

eg.2(string containing...