Exit button closing a single frame

[Thomas Molloy]

Hello all. I have GUI app that involves multiple frames. On the home frame (the first frame that appears when running the app) I have buttons that open a new frame when clicked. Included in these frames is a exit button that I want to close only the frame that it resides in when clicked. Below is the ActionListener the exit button used in one of the frames. MainWindow is the name of the class.

exitButton.addActionListener(new ActionListener()
{
	public void actionPerformed(ActionEvent e)
	{
		int response = JOptionPane.showConfirmDialog(null, "Are you sure you want to exit the application?", "CQ Real Estate App", JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);
		if (response == JOptionPane.OK_OPTION)//Message asking the user if they are sure they wish to exit the application
		{
			MainWindow.dispose();
		}
	}
});

This code gives me the error "non-static method dispose() cannot be referenced from a static context MainWindow.dispose();"
                                                                                                  ^

Any assistance would be greatly appreciated.

[Stephan van Hulst]

Assuming your MainWindow class extends JFrame (which it shouldn't do by the way, you should give it a private JFrame field instead), you should call the dispose() method on this (or preferably, the private field).

[Rob Camick]

I have GUI app that involves multiple frames.

First of all you should not be using multiple JFrames. Generally speaking an application should only have a single JFrame. Child windows should be JDialogs.

This code gives me the error "non-static method dispose() cannot be referenced from a static context MainWindow.dispose();"

You can use the ActionEvent object to access the frame you want to close:

JButton button = (JButton)e.getSource();
Window window = SwingUtilities.windowForComponent( button );
window.dispose();

You can also check out Closing an Application for a simple API to handle closing of the frame.