TYBcs Java Slip 3-1 | IProgramX

Q. Define a class MyData (Day, Month, year) with methods to accept and display a MyData object Accept data as dd, mm, yyyy. Throw user defined execution “InvalidDateException” if the data is invalid.

Program: 

import java.io.*;

class InvalidDateException extends Exception{}

class MyDate{

 int day,month,year;

 MyDate(){
  day=month=year=0;
 }
 MyDate(int d,int m,int y){
  try{ 
   if(m <= 0 || m >=13)
    throw new InvalidDateException();

   month = m;
   switch(m)
   {
    case 1: 
    case 3: 
    case 5: 
    case 7: 
    case 8: 
    case 10: 
    case 12:
     if(d <=0 || d >=32)
      throw new InvalidDateException();
    
     day = d; 
     break;
    case 4: 
    case 6: 
    case 9: 
    case 11:
     if(d<=0 || d >=31)
      throw new InvalidDateException();
     day = d;     
     break;
    case 2 : 
     if(day <=0 || day >=29)
      throw new InvalidDateException();
     day = d;
     break;
   }
   year = y;
  }
  catch(InvalidDateException e){
   System.out.println(e);  
  }
 }

 public String toString(){
  return day+"/"+month+"/"+year;
 }
}

class DateTest{
 public static void main(String args[]) throws IOException{
  BufferedReader br = new BufferedReader(
     new InputStreamReader(
      System.in));   
  System.out.print("Enter date: dd mm yyyy");
  MyDate d = new MyDate(Integer.parseInt(br.readLine()),
     Integer.parseInt(br.readLine()),
     Integer.parseInt(br.readLine()));

  System.out.println(d);
 }
}