Notes

package com.codington.module8;

/**
* CheckEventPass is about checking the number of tickets assigned ticket ID's.
* Topic: Java Error Handling and Assertions.
*/
public class CheckPassEvent {
public static void main(String[] args) {

//TODO 1. Declare an integer for the number of children attending the event
//TODO 2. Declare an integer for the number of adults attending the event.
//TODO 3. Declare an integer for the number of tickets.
//TODO 4. Declare a single dimensional integer array for ticket ID's.
//TODO 5. Declare an integer average visitor.
//TODO 6. Declare an integer no of days and initialize it with zero.
//TODO 7. Initialize the number of children to 2.
//TODO 8. Initialize the number of adults to 6.
//TODO 9. Initialize the number of tickets with the sum of number of children and number of adults.
//TODO 10. Initialize the ticket ID array with number of tickets as the size.
//Note:Try changing value of "ticketID" index from [noOfTickets] to [noOfTickets-1] in next run and see the output.

int noOfChildren;
int noOfAdults;
int noOfTickets;
int ticketID[];


int averageVisitor;
int noOfDays = 0;

noOfChildren = 2;
noOfAdults = 6;
noOfTickets = noOfChildren + noOfAdults;
ticketID = new int[noOfTickets];

//TODO 11. Declare a try/catch/finally block.
//TODO 11.a In try block, print the last element of ticketID array.
//TODO 11.b In try block, calculate the average visitor value by dividing number of tickets by no of days.
//TODO 11.c Surround the try block with catch block by passing ArithmeticException and ArrayIndexOutOfBoundsException as parameter.
//TODO 11.d In catch block, print the type of exception thrown by printing the value of exception parameter
//TODO 11.e In finally block, print the message “Executing the finally block.”.
//TODO 11.f In finally block, set the number of days to the value 2.
//TODO 11.g In finally block, calculate the average visitor value by dividing number of tickets by no of days.
//TODO 11.h In finally block, print the value of average visitor.

try{
System.out.print("Access element of ticket id := ");
System.out.println(ticketID[noOfTickets-1]);

System.out.print("Exception thrown :");
averageVisitor = noOfTickets / noOfDays;

}
catch(ArithmeticException e){
System.out.println(e);
}
catch(ArrayIndexOutOfBoundsException e){
System.out.println(e);
}finally{

System.out.println("Executing the finally block.");
noOfDays = 2;
averageVisitor = noOfTickets / noOfDays;
System.out.println("Average visitor per day: " + averageVisitor);
}

//Assign IDs to tickets
//TODO 12.Declare an integer for pass id and initialize it with zero.

int passID = 0;

/*TODO 13. Use for loop to populate the ticket ID array.
* a. Declare an integer i for the loop index and assign it value zero inside the loop .
* b. Use 'No of tickets' as upper bound.
* c. Increment the loop index 'i' by 1.
*/


for(int i=0; i < noOfTickets-1; i++){
passID = i + 1;
ticketID [i] = passID;

}

//TODO 13.i.Inside the for loop, pass ID can be generated by adding 1 to the loop index.
//TODO 13.ii.Inside the for loop, assign pass id generated to the respective element of the ticket ID array .
// Verify all the tickets issued assigned with ticket ID's using assert.


//TODO 14. Declare an integer variable for the loop index and initialize with zero.
//TODO 15. Print “Verifying tickets assigned with ticket ID's” message to the console.
System.out.println("Verifying tickets assinged with ticket ID's");

//TODO 16. Loop through the ticketID array using a do..while loop with array size as the boundary.

int z =0;
do{
assert(ticketID[z] != 0):"Mismatch in issuance of ticket ID's";
System.out.println("Ticket ID: " + ticketID[z]);
z++;
}while(z < ticketID.length);


/*TODO 17. Inside the do..while loop
*i. Verify if value of each element of the ticket id array is not equal to zero using assert statement.
*ii. If the value of ticket id array element is equal to zero, print 'Mismatch in issuance of ticket ID's' to the console as an assertion error.
*iii. Print ticket ID value to console.
*iv. Increase the loop index and verify all the values in the array.*/


//TODO 18.Print 'Ticket ID's are assigned to total number of tickets issued.' to the console after exiting the do..while loop.
System.out.println("Ticket ID's are assigned to total number of tickets issued.");
}
}