1. //Is an example of object and classes in java.,

   //Create Train Reservation program in java..,
   import java.io.*;
   import java.lang.Exception;
   class SeatNotAvailableException extends Exception
   {
   SeatNotAvailableException(int x)
   {
   super("Train No:"+x+"\n*******No Seat Available*******");
   }
   }
   

   class Train
   {
   int TrainNo=2309879,NoSeat=500,D=12,M=05,Y=2012,TicketNo=1000,count=0;
   String To,From;
   Train()
   {
   }
   void printUnderLine()
   {
   System.out.println("-----------------------------------");
   }
   void booking(String x,String y,int o)throws SeatNotAvailableException
   {
   printUnderLine();
   printUnderLine();
   To=x;
   From=y;
   int ava=count+o;
   TicketNo+=1;
   if(NoSeat>=ava)
   {
   count=count+o;
   System.out.println("++++Booking is Successfull++++");
   System.out.println("***********Your Ticket Details***********");
   System.out.println("Train No: "+TrainNo+"\nTicket No: "+TicketNo+"\nTo: "+To+"\nFrom: "+From+"\nDate: "+D+":"+M+":"+Y);
   System.out.println("***************************************");
   }
   else
   {
   throw new SeatNotAvailableException(TrainNo);
   }
   printUnderLine();
   printUnderLine();
   }
   void availableSeats()
   {
   int bal=NoSeat-count;
   printUnderLine();
   printUnderLine();
   System.out.println("Train No: "+TrainNo+"\nAvailable Seats : "+bal);
   printUnderLine();
   printUnderLine();
   }
   }
   class MainTrain
   {
   public static void main(String args[])throws IOException
   {
   String g,h;
   int u,op;
   DataInputStream in=new DataInputStream(System.in);
   Train p=new Train();
   try
   {
   do
   {
   System.out.println("***************************************");
   System.out.println("Enter the place of TO:");
   g=in.readLine();
   System.out.println("Enter the place of FROM:");
   h=in.readLine();
   System.out.println("How much seat you need:");
   u=Integer.parseInt(in.readLine());
   p.booking(g,h,u);
   p.availableSeats();
   System.out.println("Anather booking press 1 and to exit press 0");
   op=Integer.parseInt(in.readLine());
   System.out.println("***************************************");
   }
   while(op==1);
   }
   catch(SeatNotAvailableException e)
   {
   e.printStackTrace();
   }
   finally
   {
   System.out.println("************END************");
   }
   }
   }