How do i know the type of the input?

[Salha]

how can i make the input only string? such as other types like int and double wont be allowed?
what kind of exception shall i use?

[horace1]

how can i make the input only string? such as other types like int and double wont be allowed?
what kind of exception shall i use?

if you are using Scanner
http://java.sun.com/j2se/1.5.0/docs/api/java/util/Scanner.html

you could call hasNextInt(), hasNextFloat(), etc which should all return false.

If your strings should only contain alphabetic characters (no digits) you could use Pattern matching

[Salha]

if you are using Scanner
http://java.sun.com/j2se/1.5.0/docs/api/java/util/Scanner.html

you could call hasNextInt(), hasNextFloat(), etc which should all return false.

If your strings should only contain alphabetic characters (no digits) you could use Pattern matching

I am using GUI and i get the iput from the text field. So if the user enters digits he gets an error msg. But how can i do it?

[r035198x]

I am using GUI and i get the iput from the text field. So if the user enters digits he gets an error msg. But how can i do it?

What if the user enters a string containing digits like r035198x. Would you allow that?

[Salha]

What if the user enters a string containing digits like r035198x. Would you allow that?

NO!! just words, it is a dictionary!!! please help :( my deadline is today!!!!!

[r035198x]

NO!! just words, it is a dictionary!!! please help :( my deadline is today!!!!!

Ah well I was just curious.

Well do you know any regular expressions?
If you don't then you can just write a method called say, hasDigit which returns a boolean

 public static boolean hasDigit(String s) { 
 //Go through the string's chars one at a time looking for a digit
}  
 

Then you can just use that method.