Class ExitExample1

java.lang.Object

org.jdesktop.application.AbstractBean

org.jdesktop.application.Application

examples.ExitExample1

public class ExitExample1
extends Application

Demonstrate the use of an ExitListener.

This class adds an Application.ExitListener that asks the user to confirm exiting the application. The ExitListener is defined like this:

class MaybeExit implements Application.ExitListener {
    public boolean canExit(EventObject e) {
        Object source = (e != null) ? e.getSource() : null;
        Component owner = (source instanceof Component) ? (Component)source : null;
        int option = JOptionPane.showConfirmDialog(owner, "Really Exit?");
        return option == JOptionPane.YES_OPTION;
    }
    public void willExit(EventObject e) { }
}
 

When the user attempts to close the window, Application.exit is called by JFrame's WindowListener. The exit method checks the ExitListener.canExit methods and aborts the attempt to exit if any of them return false.

Nested Class Summary

Nested classes/interfaces inherited from class Application

Application.ExitListener

Constructor Summary

Constructors

Constructor	Description
ExitExample1()

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)
protected void	shutdown()	Called when the application exits.
protected void	startup()	Responsible for starting the application; for creating and showing the initial GUI.

Methods inherited from class Application

addExitListener, end, exit, exit, getContext, getExitListeners, getInstance, getInstance, hide, initialize, launch, quit, ready, removeExitListener, show

Methods inherited from class AbstractBean

addPropertyChangeListener, addPropertyChangeListener, firePropertyChange, firePropertyChange, getPropertyChangeListeners, removePropertyChangeListener, removePropertyChangeListener

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ExitExample1

public ExitExample1()

Method Details

startup

protected void startup()

Description copied from class: Application

Responsible for starting the application; for creating and showing the initial GUI.

This method is called by the static launch method, subclasses must override it. It runs on the event dispatching thread.

Specified by:

startup in class Application

See Also:

• Application.launch(Class, String[])
• Application.initialize(String[])
• Application.shutdown()

shutdown

protected void shutdown()

Description copied from class: Application

Called when the application exits. Subclasses may override this method to do any cleanup tasks that are neccessary before exiting. Obviously, you'll want to try and do as little as possible at this point. This method runs on the event dispatching thread.

Overrides:

shutdown in class Application

See Also:

• Application.startup()
• Application.ready()
• Application.exit()
• Application.addExitListener(Application.ExitListener)

main

public static void main(String[] args)