11 Questions
What are the three main components of a GUI application?
GUI components, event listeners, and application methods
What is the purpose of an event listener?
To listen for events from specific GUI components and respond to them
What is an event in Java represented as?
An object
What is the purpose of an adapter class in Java event handling?
To simplify the creation of event handlers by providing empty implementations of listener interface methods
When is a method in the listener object invoked?
When the user generates an event
What is the purpose of application methods in a GUI application?
To do useful work for the user in the program
What must a program do in order to respond to events in Java?
Create an event listener object for the type of event and register it with the GUI component.
What is the purpose of 'repaint()' in the given Java code snippet?
It triggers the repainting of the graphics component.
What is the significance of 'Point temp=new Point(); temp.x=x; temp.y=y;' in the Java code snippet?
It creates a new Point object with current mouse click coordinates.
What is the role of 'addMouseListener(new MouseAdapter(){...});' in the provided Java code snippet?
It associates a listener to detect mouse clicks and draw circles.
Why is it necessary to setBackground(Color.red); in the MouseClicks constructor?
To set the initial color of the GUI component.
Explore the three parts of a GUI application: GUI components like frames and buttons, listener methods that respond to events, and application methods that perform useful work. Learn about event listeners that monitor events from specific GUI components.
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