Java date validation joda time

Question

Is there anyway to validate if a given date(yyyy-MM-dd) is a valid date? It should handle leap year too. eg(2015-02-29) should be invalid. I'm retrieving the date as a string and putting it into a joda DateTime object.

Answer 1

The previous responses should be fine, but given that the OP specifically asked for a Joda-Time version, this alternative will also work:

@Test
public void test() {

    String testDateOk = "2015-02-25"; // Normal date, no leap year
    String testDateOk2 = "2016-02-29"; // Edge-case for leap year
    String testDateWrong = "2017-02-29"; // Wrong date in a non-leap year
    String testDateInvalid = "2016-14-29"; // plain wrong date

    assertTrue(isValidDate(testDateOk));
    assertTrue(isValidDate(testDateOk2));
    assertFalse(isValidDate(testDateWrong));
    assertFalse(isValidDate(testDateInvalid));
}

boolean isValidDate(String dateToValidate){
    String pattern = "yyyy-MM-dd";

    try {
        DateTimeFormatter fmt = DateTimeFormat.forPattern(pattern);
        fmt.parseDateTime(dateToValidate);
    } catch (Exception e) {
        return false;
    }
    return true;
}