Thread: need help with regex

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 punctuation and numbers gives the output "The string must consist of letters!")
java Word AAABB@I5P
The string must consist of letters!

eg.3(continous character gives the output)
java Word AAAAAAAwwwwwwwwwwwTTT
7A11w3T

and heres the code i got so far

[COLOR="Blue"]import java.util.Scanner;
import java.io.PrintStream;
 
public class Word
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
PrintStream output = System.out;
 
output.print("java Word ");
String s = input.nextLine();
if (s.equals(""))
{
output.print("Usage: java Word <string>");
}
if (s.matches("[^0-9]*[0-9]+[^0-9]*"))
{
output.print("The string must consist of letters!");
}
if (s.matches("[\\p]")) [COLOR="SeaGreen"]//is this the correct code for all punctuations??[/COLOR]
{
output.print("The string must consist of letters!");
}
 
}
}[/COLOR]

when i enter a number i get the correct output, however I am not sure on how to exclude punctuations from the string and i get a weird error when typing in [\\p],

All you want is letters right? The simple letter matcher should suffice [a-zA-Z]. See Regular Expressions for more info and possible combinations

Edit: crossposted at need help with regex. Please read The problems with crossposting

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 if i add a number or punctuation the output "The string must consist of letters!" does not show,
if i use a negation like (!s.matches("[a-zA-Z]") then if i input letters and number or punctuations, the output "The string must consist of letters!" always show,,
however if i use (s.matches("[^a-zA-Z]") then if i input numbers and punctuations then i get the correct output but say if i type in "aa2" as an input then the output "The string must consist of letters!" does not show,,
i want to exclude numbers and punctuation completely from the string but dont know how :S
u said "The simple letter matcher should suffice [a-zA-Z]",, can u clarify this for me? this whole regex thing is confusing for me :S