The Java Developers Almanac 1.4

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e738. Getting the JFrame of a Component

In order to find the frame that contains a component, it is necessary to walk up the component's parents until the frame is encountered. SwingUtilities.getRoot() is a convenience method that finds the frame.

This example implements an action that finds and hides the frame of the component that triggered the action. See also e743 Creating a JButton Component.

    // Create an action
    Action action = new AbstractAction("Action Label") {
        // This method is called when the action is triggered
        public void actionPerformed(ActionEvent evt) {
            Component c = (Component)evt.getSource();
    
            // Get the frame
            Component frame = SwingUtilities.getRoot(c);
    
            // Hide the frame
            frame.setVisible(false);
        }
    };

Related Examples

e733. Creating a JFrame
e734. Exiting an Application When a JFrame Is Closed
e735. Disabling the Close Button on a JFrame
e736. Creating a Borderless Window
e737. Showing a Dialog Box

See also: Actions JButton JCheckBox JComboBox JDesktop and JInternalFrame JLabel JList JProgressBar JRadioButton JScrollPane JSlider JSpinner JSplitPane JTabbedPane JToolBar Keystrokes and Input Maps Layout Look and Feel Menus Progress Monitor The Screen Tool Tips UI Default Values

© 2002 Addison-Wesley.