code: public Integer getYear() {
  		String dateValue = getValue();
  
  		if (dateValue != null && dateValue.length() >= YEAR_END) {
  			return parseDateComponent(dateValue.substring(YEAR_START, YEAR_END), getPaddingChar());
  		} else {
  			return null;
  		}
  	}
docs: Returns the year value.
  
  @return the year, or null if unspecified.