Define a class Date (Day, Month, Year) with functions to accept
and display it. Accept date from user. Throw user defined exception “invalid
Date Exception” if the date is invalid.
class InvalidDateException extends Exception {
public InvalidDateException(String
message) {
super(message);
}
}
class Date {
private int day, month,
year;
public Date(int day, int
month, int year) {
this.day = day;
this.month = month;
this.year = year;
}
public void displayDate()
{
System.out.println("Date: " + day + "/" + month +
"/" + year);
}
public boolean
isValidDate() {
if (year >= 1900
&& year <= 2100) {
if (month >=
1 && month <= 12) {
if (day
>= 1 && day <= 31) {
if
(month == 4 || month == 6 || month == 9 || month == 11) {
return day <= 30;
} else
if (month == 2) {
if
(year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)) {
return day <= 29;
}
else {
return day <= 28;
}
}
return
true;
}
}
}
return false;
}
}
public class Main {
public static void
main(String[] args) {
try {
int day = 31;
int month = 12;
int year = 2023;
Date date = new Date(day,
month, year);
if
(date.isValidDate()) {
date.displayDate();
} else {
throw new
InvalidDateException("Invalid Date Exception: The entered date is not
valid.");
}
} catch
(InvalidDateException e) {
System.err.println(e.getMessage());
}
}
}
