Making a String accept only letters ( no numbers ).

Question

Is it possible to allow only letters or numbers in a string in java ? for example :

String Text;
Text = jTextField1.getText();

now

if (Text is a number) {System.out.println("Invalid Input");}

Answer 1

you have two choices to use

• JFormattedTextField with proper Formatter or InputVerifier

• use DocumentFilter

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• notice don't use String Text; (possible reserved word for API name or its method) use String text; more in the Naming convention