Which java.util classes and interfaces support event handling?

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The EventObject class and the EventListener interface support event processing.

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In Core Java, event handling is typically associated with the Abstract Window Toolkit (AWT) and Swing, which are part of the Java Foundation Classes (JFC). The primary classes and interfaces involved in event handling in Java are:

  1. java.util.EventObject: This is a common base class for all event objects. It is part of the java.util package.
  2. java.util.EventListener: This interface is implemented by all event listener interfaces. It is part of the java.util package.

However, it’s important to note that while EventObject and EventListener are part of java.util, the main event handling classes and interfaces are typically found in the java.awt and javax.swing packages, such as:

  • java.awt.event package: Contains classes and interfaces for AWT events.
    • ActionListener: Interface for receiving action events.
    • MouseListener: Interface for receiving mouse events.
    • MouseMotionListener: Interface for receiving mouse motion events.
    • KeyListener: Interface for receiving key events.
  • javax.swing.event package: Contains classes and interfaces for Swing events.
    • ActionListener: Interface for receiving action events in Swing.
    • MouseListener: Interface for receiving mouse events in Swing.
    • MouseMotionListener: Interface for receiving mouse motion events in Swing.
    • KeyListener: Interface for receiving key events in Swing.

These are just a few examples, and there are more classes and interfaces in these packages for various types of events. Event handling in Java involves implementing these listener interfaces and registering them with the corresponding components to handle events when they occur.