code: public static boolean isPrimitiveWrapper(Element element) {
  		if (element == null) {
  			return false;
  		} else if (element.toString().equals(Boolean.class.getCanonicalName())) {
  			return true;
  		} else if (element.toString().equals(Integer.class.getCanonicalName())) {
  			return true;
  		} else if (element.toString().equals(Long.class.getCanonicalName())) {
  			return true;
  		} else if (element.toString().equals(Byte.class.getCanonicalName())) {
  			return true;
  		} else if (element.toString().equals(Short.class.getCanonicalName())) {
  			return true;
  		} else if (element.toString().equals(Character.class.getCanonicalName())) {
  			return true;
  		} else if (element.toString().equals(Double.class.getCanonicalName())) {
  			return true;
  		} else if (element.toString().equals(Float.class.getCanonicalName())) {
  			return true;
  		} else {
  			return false;
  		}
  	}
docs: Tests if the given element is a primitive wrapper.
  @param element
  @return true if the element is a primitive wrapper, false otherwise.
  @author vvakame