//
program to validate date in java without using predefined
import
java.util.*;
class DateValidator
{
public static void
main(String[] args)
{
String msg="";
System.out.println("enter date to validate in
formate:dd/mm/yyyy");
String date=new
Scanner(System.in).nextLine();
if(date.matches("^\\d{2}/\\d{2}/\\d{4}$"))
{
String
d[]=date.split("/");
int
day = Integer.parseInt(d[0]);
int
month = Integer.parseInt(d[1]);
int
year = Integer.parseInt(d[2]);
switch
(month) {
case
1:
case
3:
case
5:
case
7:
case
8:
case
10:
case
12: if(day
case
4:
case
6:
case
9:
case
11: if(day
case
2://check for leap year or not
if
((year % 100 == 0 && year % 400 == 0) || (year % 100 != 0
&& year % 4 == 0)) {
if(day
} else
{
if(day
}break;
default:msg+="invalid date";
}
}
else
{
msg+="invalid date";
}
System.out.println(msg);
}
}
Output:
