Question

Multi-Scene JavaFX Application with Objects A sample program Q3Skeleton.java to keep track of 3 best friends as strings has been posted in an announcement. Its home screen shows the friends' names. Its edit screen allows you to change your best friends. Its play screen gives randomly generated suggestion of one friend to play with. You will enhance the skeleton with 3 new features. Feature A below entails the most work. It carries the same weight as features B and C combined. A. Change strings for a friend name in the sample to an object with 2 data attributes. If you choose to build a contact list as shown, the two attributes will be name and phone number. See Figures 1 and 2 . B. Read initial data from a file when starting the application and save updated data to the same file when closing the application. I - For your own testing, you want to make some changes to the data. Close the application. Opening the app again should show you the changed data saved. C. Add a Refresh button on play screen. Pressing the refresh button will regenrate another friend name. The screen should look like Figure 3. Figure 1. The grid pane of Home Screen has 3 columns now. Figure 1. The grid pane of Home Screen has 3 columns now. My Best Friends Edit Screen 1 2 3 Figure 2. The grid pane of Edit Screen also has 3 columns. Suggestion: Play with Peter. Figure 3. Play screen has a new refresh button to regenrate friend's name. Tips 1. Testing is important and tricky. In an early version, I had a bug of not saving the edited names in the file if I did not leave the Edit Screen before closing the application. 2. Deciding on the right order to implement the three required is important. 3. For time management, if after spending 30 minutes on this question and you made no progress, you should consider switching to Question 1 or 2.

Answer 1

The student's task involves adding features to a JavaFX application, including using Contact objects with name and phone attributes, implementing file I/O for data persistence, and adding a button to refresh displayed data.

Step-by-step explanation:

The student's question relates to enhancing a JavaFX application with three new features involving object-oriented programming, file I/O, and GUI interaction. Feature A requires modifying the program to use objects for representing friends instead of plain strings, implying the creation of a new class with attributes for name and phone number.

Feature B involves reading initial data from a file at the start and saving updates to the same file upon closure of the application, which tests knowledge of file handling in Java. Feature C demands the addition of a Refresh button on the play screen that, when clicked, will regenerate another friend's name to play with, showcasing event-driven programming skills.

Steps to Implement Feature A:

Create a new class Contact with private attributes for name and phone number.

Modify existing code to use Contact objects instead of strings.

Update the GUI to display and edit the new object fields.

Steps for Feature B:

Utilize file I/O operations to read data from a file on application start.

Make sure to update the file upon exiting the program with current data.

Steps for Feature C:

Add a new button to the GUI in the play screen.

Assign an event handler that regenerates and displays a new friend's contact when pressed.

Answer 2

To enhance the Multi-Scene JavaFX Application, Feature A involves replacing strings for friend names with objects having two data attributes, such as name and phone number. Feature B focuses on reading initial data from a file upon application start and saving updated data to the same file upon closure. Feature C introduces a Refresh button on the play screen, allowing users to generate another friend's name.

Step-by-step explanation:

Feature A requires significant work as it involves a fundamental change from using simple strings to using objects with two data attributes (name and phone number). This modification enhances the program's structure and allows for more detailed information about each friend. Features B and C, while important, are less complex.

Feature B ensures persistent data storage by reading from and saving to a file, promoting data integrity across application sessions. Feature C adds a convenient user interface element, the Refresh button, providing a dynamic and interactive experience by regenerating friend names on demand.

Implementing these features requires careful consideration of the order of implementation. Feature A should be prioritized due to its complexity and the need to refactor existing code. Feature B, involving file I/O operations, comes next to ensure proper data management. Feature C, the addition of the Refresh button, can then be implemented for an improved user experience.

Effective time management is crucial, and the provided tips offer valuable insights, emphasizing testing, strategic decision-making, and flexibility in task prioritization for optimal completion of the project.