GUIS in Java Section 1🦇👻🎃 Flashcards
This covers the basic JavaFX questions found in Chapter 6 section 1Introduction to GUI Programming. https://math.hws.edu/eck/cs124/downloads/javanotes9-swing-linked.pdf
What is the fundamental difference between GUI programs and traditional “straight-through” programs?
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GUI programs are event-driven and respond to user actions generating events, while traditional programs follow a linear, straight-through execution flow.
How are GUI programs event-driven, and what are examples of user actions that generate events?
GUI programs respond to events such as clicking on a button, pressing a key, or interacting with GUI components like menus. Events are generated by user actions.
What is the primary purpose of a Stage in JavaFX GUI programming?
A Stage represents a top-level window or container in JavaFX and is used to hold the content of a GUI application.
In Java, what is the primary responsibility of the start() method in GUI programming?
The start() method is the entry point for a JavaFX application and is responsible for initializing the graphical user interface.
What is the significance of events being objects in GUI programming?
Events being objects allows for structured and flexible event handling, and they can carry information about the event, such as its type and source.
How is a GUI component represented in Java, and why is it important to consider them as objects?
GUI components are represented as objects in Java, and they encapsulate the visual and functional aspects of the user interface. Treating them as objects allows for modular and object-oriented programming.
What is the role of a layout manager in GUI programming?
A layout manager is responsible for arranging components within a container, determining their positions and sizes to create the visual layout of a GUI.
What is the ActionListener interface, and why is it used in event handling?
The ActionListener interface is used for handling events in Swing. It defines the actionPerformed method, which is called when an action event occurs, such as a button click.
How does the listener object register itself to listen for events from a button in the sample program?
The listener object registers itself with the button using the addActionListener() method, specifying the event handler method to be called when the button’s action event occurs.
Can you explain the potential use of lambda expressions for event handling in Swing, as shown in the program?
Lambda expressions can be used to define some event handlers concisely, especially for functional interfaces like ActionListener. They offer a shorter syntax for implementing event handling logic.
Note: Lambdas cannot be used for all event handling in Swing, since most interfaces in Swing are not functional interfaces.
