The date type in Java is quick to determine if the dates are valid.

If the date is illegal, throw an exception to try {String date_str = "5555-22-33"; SimpleDateFormat format=new SimpleDateFormat ("Yyyy-mm-dd"); Format.setlenient (false);D ate Date = Format.parse (date_ STR);} catch (Exception ex) {ex.printstacktrace (); SYSTEM.OUT.PRINTLN ("date not valid");}

Description of the notes in the JDK:

/**     * Specify whether or not date/time parsing are to be lenient.     with * Lenient parsing, the parser could use heuristics to interpret inputs that     * does not precisely match this objec T ' s format.  With strict parsing,     * Inputs must match this object ' s format.     *     * <p>this method is equivalent to the following call.     * <blockquote><pre>     *  Getcalendar (). Setlenient (lenient)     * </pre></blockquote >     *     * <p>this leniency value is overwritten by a call to {@link     * #setCalendar (Java.util.Calendar ) Setcalendar ()}.     *     * @param lenient when {@code true}, parsing is lenient     * @see java.util.calendar#setlenient (Boolean) */     Public    void Setlenient (Boolean lenient)    {        calendar.setlenient (lenient);    }

The date type in Java is quick to determine whether the dates are legitimate.