Good morning, I was wondering if it is possible to force the user to put a letter or not advance. With an int it would be something like this:
int x = 0;
while (x < 1){
if(lector.hasNextInt){
int numero = lector.nextInt();
x++;
}
}
I've been looking for how to do it with a letter but I can not find it.
Thank you.
Here I leave a code that I just did, I hope it serves you, it's a shabby but fast and effective way
public static void main(String[] args) {
boolean salir=false;
Scanner input = new Scanner(System.in);
while(salir == false) {
System.out.println("Pulsa y para continuar");
char letraUsuario = input.next().toLowerCase().charAt(0);
if(letraUsuario == 'y') {
System.out.println("Puedes continuar");
salir = true;
}else {
System.out.println("La letra no es adecuada, vuelve a introducir una letra");
}
}
}
You can compare against a regular expression
br = new BufferedReader(new InputStreamReader(System.in));
String sTexto;
String pattern = "[a-zA-Z]";
do {
System.out.println("Ingrese una letra");
sTexto = br.readLine();
} while(!sTexto.matches(pattern));