Java - Diferenciar caracteres numericos de letras

Pattern pattern = Pattern.compile("(\\d{5})([a-zA-Z]{5})");

Matcher matcher = pattern.matcher("12345abcde");

matcher.find();

if(matcher.matches()) {

System.out.println(matcher.group(0)); //Imprime 12345abcde

System.out.println(matcher.group(1)); //Imprime 12345

System.out.println(matcher.group(2)); //Imprime abcde

}