1 package jp.sourceforge.stigmata.birthmarks;
7 import jp.sourceforge.stigmata.BirthmarkElement;
10 * Null birthmark element.
12 * @author Haruaki TAMADA
15 public class NullBirthmarkElement extends BirthmarkElement{
16 private static final long serialVersionUID = -92345638932523L;
18 private static final NullBirthmarkElement ELEMENT = new NullBirthmarkElement();
20 private NullBirthmarkElement(){
24 public static BirthmarkElement getInstance(){
29 public int hashCode(){
34 public boolean equals(Object o){
35 return o instanceof NullBirthmarkElement;
39 public String toString(){