public interface WindowListener extends EventListener. The listener interface for receiving window events. The class that is interested in processing a window event either implements this interface (and all the methods it contains) or extends the abstract WindowAdapter class (overriding only the methods of interest).
How do you use WindowListener?
Methods of WindowListener interface
- public abstract void windowActivated (WindowEvent e);
- public abstract void windowClosed (WindowEvent e);
- public abstract void windowClosing (WindowEvent e);
- public abstract void windowDeactivated (WindowEvent e);
- public abstract void windowDeiconified (WindowEvent e);
Which method used to register window listener?
addWindowListener() method
The class which processes the WindowEvent should implement this interface. The object of that class must be registered with a component. The object can be registered using the addWindowListener() method.
What is windowClosing in Java?
We can close the AWT Window or Frame by calling dispose() or System. exit() inside windowClosing() method. The windowClosing() method is found in WindowListener interface and WindowAdapter class. The WindowAdapter class implements WindowListener interfaces.
What does the AWT stands for?
Abstract Window Toolkit
The Abstract Window Toolkit (AWT) supports Graphical User Interface (GUI) programming.
What is setDefaultCloseOperation in Java?
The default behavior is to simply hide the JFrame when the user closes the window. To change the default behavior, you invoke the method setDefaultCloseOperation(int) . To make the JFrame behave the same as a Frame instance, use setDefaultCloseOperation(WindowConstants. DO_NOTHING_ON_CLOSE) .
What is a listener in context to event handling?
A listener is a object that is notified when an event occurs. It has two major requirements first, it must have been registered with one or more sources to receive notification about specific event types, and secondly it must implement methods to receive and process these notifications.
What is listener in Java?
A user interface listener is a method which is called when the user does something (eg, click a button) that the programmer has indicated they want to be notified of. The listener method is passed an event parameter that may tell something about what happeened.
What is dispose in Java?
dispose(); causes the JFrame window to be destroyed and cleaned up by the operating system. According to the documentation, this can cause the Java VM to terminate if there are no other Windows available, but this should really just be seen as a side effect rather than the norm.
What is AWT example?
AWT stands for Abstract window toolkit is an Application programming interface (API) for creating Graphical User Interface (GUI) in Java. It allows Java programmers to develop window-based applications. AWT provides various components like button, label, checkbox, etc. used as objects inside a Java Program.
Is long from of AWT?
AWT stands for Abstract Window Toolkit. It is a platform-dependent API to develop GUI (Graphical User Interface) or window-based applications in Java. It contains a large number of classes and methods, which are used for creating and managing GUI.
