Java Year in date is parseable with letters inside
===

I have written my NotLenientDateEditor which extends CustomDateEditor

	public NotLenientDateEditor(DateFormat dateFormat, boolean allowEmpty, int exactDateLength) {
		super(dateFormat, allowEmpty, exactDateLength);
		dateFormat.setLenient(false);
Now I need add one more functionality, because The Date 12.1.20asa21 is not parseable when I have javascript enabled, but when javascript is disabled, this date is parseable as 12.1.20. 

Can You help me, how add functionality for not parse the year contains letters