JAVA Program To Check if Entered Date is Valid or Not

Code:

import java.util.Scanner;

public class Date3 

{

public static void main(String args[])

{

int  day;

int  month;

int year;

Scanner s=new Scanner(System.in);

System.out.print("Enter day\n");

day=s.nextInt();

System.out.print("Enter month\n");

month=s.nextInt();

System.out.print("Enter year\n");

year=s.nextInt();

if(day>=1 || day<=31 || month >=1 || month <= 12|| (year >=1900 && year <= 2099))

       {

   if((month ==4 || month ==6 || month ==9 ||month ==11)  && (day>=1 && day<=30 )){

  System.out.print("Date is valid");}

        else if(month ==1 || month ==3 || month ==5 || month ==7 || month ==8 || month ==12)

    {

  System.out.print("Date is valid");}

else if(month==2&&(day>=1&&day<=29)){

System.out.print("Date is valid");}

else {

System.out.print("Date is invalid");

}

}

}

}