BlueJ Program On Validation Of Date

The following BlueJ program is a guess question for ISC students. Similar posts for ISC students will be done time to time.

 The BlueJ program is as follows:

Design a program which inputs a date in six digit number format i.e. 141296 . Test the validity of the date and print the date in full form . If date is invalid then print a message as “ Invalid Date“

1. Example :

INPUT : 141296

OUTPUT : 14th December , 96

: VALID DATE

2. Example :

INPUT : 230488

OUTPUT : 23rd April , 88

: VALID DATE

3. Example :

INPUT : 300284

OUTPUT : INVALID DATE

import java.io.*;

 class NumToWord

{

 public void show() throws IOException

  {

   int flag,leap,i,num,mon1,day1,year1;

   int dpm[]={31,28,31,30,31,30,31,31,30,31,30,31};

   leap=0;

   flag=0;

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

   clrscr();

   System.out.println("\nInput:");

   num=Integer.parseInt(br.readLine());

   year1=num%100;

   num=num/100;

   mon1=num%100;

   num=num/100;

   day1=num;

   if(year1%100==0 && year1%400==0)

   leap=1;

   else if(year1%100!=0 && year1%4==0)

   leap=1;

   if(mon1==2 && leap==1 && dpm[mon1-1]>28)

   flag=1;

   else if(mon1==2 && leap==0 && dpm[mon1-1]>28)

   flag=1;

   else if(day1>dpm[mon1-1])

   flag=1;

   if(flag==1)

   {

   System.out.println("\nInvalid Date...");

   return;

  }

  leap=day1%10;

  System.out.println("\nOUTPUT: "+ day1);

  switch(leap)

  {

   case 0:

   case 4:

   case 5:

   case 6:

   case 7:

   case 8:

   case 9:

   System.out.print(" th");

   break;

   case 1:

   System.out.print(" st");

   break;

   case 2:

   System.out.print(" nd");

   break;

   case 3:

   System.out.print(" rd");

   break;

   }

     switch(mon1)

  {

   case 1:

   System.out.print(" January,");

   break;

  case 2:

  System.out.print(" February,");

   break;

   case 3:

  System.out.print(" March,");

   break;

   case 4:

   System.out.print(" April,");

   break;

   case 5:

   System.out.print(" May,");

   break;

   case 6:

   System.out.print(" June,");

   break;

   case 7:

   System.out.print(" July,");

   break;

   case 8:

  System.out.print(" August,");

   break;

   case 9:

   System.out.print(" September,");

   break;

   case 10:

   System.out.print(" October,");

   break;

   case 11:

   System.out.print(" November,");

   break;

   case 12:

   System.out.print(" December,");

   break;

   }

  System.out.print(year1);

  

  }

}

Related Post:  BlueJ Programs on String/Sentence

 In this above program user has to enter the date in ‘ddmmyyyy’ format from which date, month and year are separated. The first checking point is whether the year is leap year or not. Total number of days of each month is stored in a one dimensional array and from there validation of date is confirmed using else if ladder.

After the validation job, it is displayed in proper format using switch statement. Another switch statement is used in this program to display the month name. Year number is displayed at the end.