Check String date is date or not and convert into date object. Also checking all date formats

Chek Stirng date is date or not and convert into date object..
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class DateUtil {

    // List of all date formats that we want to parse.
    // Add your own format here.
    private static List<SimpleDateFormat>;
            dateFormats = new ArrayList<SimpleDateFormat>() {{
            add(new SimpleDateFormat("M/dd/yyyy"));
            add(new SimpleDateFormat("dd.M.yyyy"));
            add(new SimpleDateFormat("M/dd/yyyy hh:mm:ss a"));
            add(new SimpleDateFormat("dd.M.yyyy hh:mm:ss a"));
            add(new SimpleDateFormat("dd.MMM.yyyy"));
            add(new SimpleDateFormat("dd-MMM-yyyy"));
        }
    };

    /**
     * Convert String with various formats into java.util.Date
     *
     * @param input
     *            Date as a string
     * @return java.util.Date object if input string is parsed
     *          successfully else returns null
     */
    public static Date convertToDate(String input) {
        Date date = null;
        if(null == input) {
            return null;
        }
        for (SimpleDateFormat format : dateFormats) {
            try {
                format.setLenient(false);
                date = format.parse(input);
            } catch (ParseException e) {
                //Shhh.. try other formats
            }
            if (date != null) {
                break;
            }
        }

        return date;
    }

public static void main(String[] args) {
        System.out.println("10/14/2012" + " = " + DateUtil.convertToDate("10/14/2012"));
        System.out.println("10-Jan-2012" + " = " + DateUtil.convertToDate("10-Jan-2012"));
        System.out.println("01.03.2002" + " = " + DateUtil.convertToDate("01.03.2002"));
        System.out.println("12/03/2010" + " = " + DateUtil.convertToDate("12/03/2010"));
        System.out.println("19.Feb.2011" + " = " + DateUtil.convertToDate("19.Feb.2011" ));
        System.out.println("4/20/2012" + " = " + DateUtil.convertToDate("4/20/2012"));
        System.out.println("some string" + " = " + DateUtil.convertToDate("some string"));
        System.out.println("123456" + " = " + DateUtil.convertToDate("123456"));
        System.out.println("null" + " = " + DateUtil.convertToDate(null));

    }
}