import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
class Regex {
 
   public static void main( String args[] ) {
      // String com texto a ser verificado
      String texto = "André Carlos Ferreira da Silva";
      // Expressão regular a ser usada
      String pattern = "^([a-zA-ZÈ-Úè-ú]+)\\s";
      // Inicialização de RegExp Pattern
      Pattern r = Pattern.compile(pattern);
      // Inicialização do verificador de pattern em texto
      Matcher m = r.matcher(texto);
 
      // Se (matcher encontrou regexp na string)
      if (m.find()) {
         // escreva o grupo encontrado
         System.out.println("Olá, " + m.group(0) );
      } else {
         // mensagem de erro
         System.out.println("Você não tem mais de um nome?");
      }
   }
}

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