Question

Project: Using Java API Classes Page 3 of 5 SpaceTicket.java Requirements: The purpose of this program is accept coded space ticket information as input that includes the ticket price, category, time, date, and seat, followed by the description of the travel. Note that the eight digits for price have an implied decimal point. The program should then print the ticket information including the actual cost, which is the price with discount applied as appropriate: 25% for a student ticket (s), 35% for child ticket (c), and none for regular tickets (i.e., anything but s or c). The last line of the ticket should contain a "prize number" between 1 and 999999 inclusive that should always be printed as 6 digits (e.g., 1 should be printed as 000001). The coded input is formatted as follows: 12579500s15300701209817DSpaceX-001 Earth to Mars date ticket description (goes through last character in the code) seat time category [s, c, or anything else is a regular ticket with no discount; store this as typee char] price 12579500 has an implied decimal point for 125795.00] Whitespace (e.g., spaces or tabs) before or after the coded information should be disregarded. (Hint: After the ticket code has been read in as a String, it should be trimmed.) Your program will need to print the ticket description, the date and time, seat, the ticket price, the ticket category, the actual cost, and a random prize number in the range 1 to 999999. If the user enters a code that does not have at least 25 characters, then an error message should be printed. [The 25th character of the code is part of the ticket description.] Design: Several examples of input/output for the program are shown below. Line Program output Enter ticket code: 123456789 ** Inval1id ticket code ** 3 Ticket code must have at least 25 characters. Note that the ticket code below results in the indicated output except for the prize number which is random. When more than one item is shown on the same line (e.g., date, time, and seat on line 4), there are three spaces between them (do not use the tab escape sequence \t). Line Program output Enter ticket code: 12579500x15300701209817DSpaceX-001 Earth to Mars Space Ticket: SpaceX-001 Earth to Mars Date: 07/01/2098 Time: 15:30 Seat: 17D Price: $125,795.00 Prize Number: 174889 Cost: $125,795.00 Category: x 6 Page 3 of 5 Project: Using Java API Classes Page 4 of 5 Line Program output Enter ticket code: 12579500s15300701209817DSpaceX-001 Earth to Mars 1 Space Ticket: SpaceX-001 Earth to Mars Date: 07/01/2098 Time: 15:30 Seat: 17D Cost: $94,346.25 Category: s ize Number: 004907 Note that the ticket code below has five leading spaces (be sure you are trimming the input code). Line Program output Enter ticket code: 12579500c15300701209817DSpacex-001 Earth to Mars Ppa 013098 mime 15.30 Seat: 17D Price: $125,795.00 Prize Number: 887295 Cost: $81, 766.75 Category: c 6 Code: In order to receive full credit for this assignment, you must use the appropriate Java API classes and methods to trim the input string, to do the extraction of the category character, extraction of the substrings, conversion of substrings of digits to numeric values as appropriate, and formatting. These include the String methods trim, charAt, and substring, as well as wrapper class method Double.parseDouble which can be used to convert a String of digits into a numeric value. The dollar amounts should be formatted so that both small and large amounts are displayed properly, and the prize number should be formatted so that six digits are displayed including leading zeroes, if needed, as shown in the examples above. It is recommended as a practice that you not modify input values once they are stored. While not a requirement, you should consider making the student discount and child discount constants. For example, the following statements could be placed above the main method, static final double STUDENT DISCOUNT = .25; static final double CHILD DISCOUNT = .35; Test: You are responsible for testing your program, and it is important to not rely only on the examples above. Remember, when entering standard input in the Run I'O window, you can use the up-arrow on the keyboard to get the previous values you have entered. This will avoid having to retype the ticket info data each time you run your program, Grading Web-CAT Submission: You must submit both "completed" programs to Web-CAT at the same time. Prior to submitting, be sure that your programs are working correctly and that they have passed Checkstyle. If you do not submit both programs at once, Web-CAT will not be able to compile and run its test files with your programs which means the submission will receive zero points for correctness. I recommend that you create a jGRASP project and add the two files. Then you will be able to submit the project to Web-CAT from jGRASP. Activity 1 (pages 5 and 6) describes how to create a jGRASP project containing both of your files Page 4 of 5

Answer 1

SpaceTicket.java

import java.util.Random;
import java.util.Scanner;

public class SpaceTicket {
  
private static final double STUDENT_DISCOUNT = 0.25;
private static final double CHILD_DISCOUNT = 0.35;
  
public static void main(String[]args)
{
System.out.print("Enter ticket code: ");
Scanner sc = new Scanner(System.in);
String code = sc.nextLine().trim();
  
// checking whether the ticket code has at least 25 characters
if(code.length() < 25)
{
System.out.println("\n*** Invalid ticket code ***\nTicket code must have at least 25 characters.\n");
System.exit(0);
}
  
// assuming price always has 8 digits; 9 because substring excludes the end index
String price = code.substring(0, 8);
double ticketPrice = Double.parseDouble(price.substring(0, 6) + "." + price.substring(6));
  
// now extracting the category and applying the discount
char category = code.charAt(8);
double cost = 0;
switch(category)
{
case 's':
cost = ticketPrice - (STUDENT_DISCOUNT * ticketPrice);
break;
  
case 'c':
cost = ticketPrice - (CHILD_DISCOUNT * ticketPrice);
break;
  
default:
cost = ticketPrice;
break;
}
  
// extracting the time
String time = code.substring(9, 11) + ":" + code.substring(11, 13);
  
// extracting the date
String date = code.substring(13, 15) + "/" + code.substring(15, 17) + "/" + code.substring(17, 21);
  
// extracting the seat number
String seatNumber = code.substring(21, 24);
  
// extracting the ticket description
String ticketDesc = code.substring(24);
  
// generating the prize number
Random rand = new Random();
int prize = rand.nextInt(999999) + 1;
String prizeNum = String.valueOf(prize);
int padding = 0;
String zeros = "";
if(prizeNum.length() < 6)
padding = 6 - prizeNum.length();
for(int i = 0; i < padding; i++)
{
zeros += "0";
}
prizeNum = zeros + prizeNum;
  
/* DISPLAYING ALL THE DETAILS */
  
System.out.println("\nSpace Ticket: " + ticketDesc);
System.out.println("Date: " + date + "\tTime: " + time + "\tSeat: " + seatNumber);
System.out.println("Price: $" + String.format("%,.2f", ticketPrice) + "\tCategory: " + category + "\tCost: $"
+ String.format("%,.2f", cost));
System.out.println("Prize Number: " + prizeNum + "\n");
}
}

******************************************************************* SCREENSHOT ********************************************************

DD DD run: Enter ticket code: 123456789 Invalid ticket code * Ticket code must have at least 25 characters. BUILD SUCCESSFUL (total time: 5 seconds)

run: Enter ticket code: 12579500x15300701209817DSpaceX-001 Earth to Mars Space Ticket: SpaceX-001 Earth to Mars Seat: 17D Date: 07/01/2098 Time: 15:30 Price $125,795.00 Category: x Cost: $125, 795.00 Prize Number: 078194 BUILD SUCCESSFUL (total time: 37 seconds)

run Enter ticket code: 12579500s15300701209817DSpaceX-001 Earth to Mars Space Ticket: SpaceX-001 Earth to Mars Date: 07/01/2098 Time: 15:30 Seat: 17D Price: $125,795.00 Category: S Cost: $94, 346.25 Prize Number: 129240 BUILD SUCCESSFUL (total time: 17 seconds)

run: DD Enter ticket code: 12579500c15300701209817DSpaceX-001 Earth to Mars Space Ticket: SpaceX-001 Earth to Mars Date: 07/01/2098 Time: 15:30 Seat: 17D Price: $125,795.00 Category: c Cost: $81,766.75 Prize Number: 322897 BUILD SUCCESSFUL (total time: 1 minute 3 seconds)