How to use

add

method

in

org.apache.commons.lang3.CharSet

/**
 * <p>Constructs a new CharSet using the set syntax.
 * Each string is merged in with the set.</p>
 *
 * @param set  Strings to merge into the initial set
 * @throws NullPointerException if set is {@code null}
 */
protected CharSet(final String... set) {
  super();
  for (final String s : set) {
    add(s);
  }
}

/**
 * <p>Constructs a new CharSet using the set syntax.
 * Each string is merged in with the set.</p>
 *
 * @param set  Strings to merge into the initial set
 * @throws NullPointerException if set is {@code null}
 */
protected CharSet(final String... set) {
  super();
  for (final String s : set) {
    add(s);
  }
}

/**
 * <p>Constructs a new CharSet using the set syntax.
 * Each string is merged in with the set.</p>
 *
 * @param set  Strings to merge into the initial set
 * @throws NullPointerException if set is {@code null}
 */
protected CharSet(final String... set) {
  super();
  for (final String s : set) {
    add(s);
  }
}

/**
 * <p>Constructs a new CharSet using the set syntax.
 * Each string is merged in with the set.</p>
 *
 * @param set  Strings to merge into the initial set
 * @throws NullPointerException if set is {@code null}
 */
protected CharSet(final String... set) {
  super();
  for (final String s : set) {
    add(s);
  }
}