Java - How to check if a value is of type Date

Question

I have a project requirement. There are values in a .txt as -

 02/01/2017 00:00:00

Now I need to have some rules to check if this value in the

Answer 1

If you just want valid days, use non-lenient parsing:

String dateString = "02/28/2017 00:00:00";

DateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
df.setLenient(false);
Date date;
try {
    date = df.parse(dateString);
    System.out.println(date);
} catch (ParseException e) {
    e.printStackTrace();
}

This will throw an exception for non-existing days like the 31st of February