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public ArrayList<String> getAllFields() {
    var fields = new ArrayList<>(Arrays.asList(getClass().getDeclaredFields()));
    var list = new ArrayList<String>(fields.size());
    fields.stream().filter(f -> !Modifier.isStatic(f.getModifiers()))
              .map(f -> mapping(f)).forEach(f -> list.add(f));
    return list;
}

private String mapping(Field field) {
    try {
          return field.get(this).toString();
    } catch (IllegalAccessException | IllegalArgumentException e) {
          return "";
    }
}