Java JRootPane

// Java Program to Implement a JRootPane including creating
// a JFrame with a content pane, a menu bar, a glass pane,
// and a layered pane
import javax.swing.*;

public class RootPaneExample {
    public static void main(String[] args)
    {
        SwingUtilities.invokeLater(new Runnable() {
            public void run()
            {
                JFrame frame
                    = new JFrame("JRootPane Example");
                JRootPane rootPane = frame.getRootPane();

                // Step 1: Create a content pane
                JPanel contentPane = new JPanel();
                contentPane.add(
                    new JLabel("GeeksforGeeks"));

                // Step 2: Create a menu bar
                JMenuBar menuBar = new JMenuBar();
                JMenu fileMenu = new JMenu("File");
                JMenuItem openItem = new JMenuItem("Open");
                fileMenu.add(openItem);
                menuBar.add(fileMenu);

                // Step 3: Create and add a glass pane
                JPanel glassPane = new JPanel();

                // Make it transparent
                glassPane.setOpaque(false);
                
              // Step 4: Create a layered pane and add
                // components
                JLayeredPane layeredPane
                    = rootPane.getLayeredPane();
                JLabel label1 = new JLabel("Label 1");
                JLabel label2 = new JLabel("Label 2");
                layeredPane.add(label1,
                                JLayeredPane.DEFAULT_LAYER);
                layeredPane.add(label2,
                                JLayeredPane.PALETTE_LAYER);

                // Set the content pane, menu bar, and glass
                // pane
                rootPane.setContentPane(contentPane);
                rootPane.setJMenuBar(menuBar);
                rootPane.setGlassPane(glassPane);

                frame.setSize(300, 200);
                frame.setDefaultCloseOperation(
                    JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
    }
}

// Java Program to Implement setContentPane and setJMenuBar
// methods with JRootPane
import javax.swing.*;

// Driver Class
public class JRootPaneExample {
    public static void main(String[] args)
    {
        SwingUtilities.invokeLater(() -> {
            // Create a JFrame
            JFrame frame = new JFrame("JRootPane Example");
            JRootPane rootPane = frame.getRootPane();

            // Step 1: Create a content pane and set it
            JPanel contentPane = new JPanel();
            JLabel label = new JLabel("Welcome to GFG");
            contentPane.add(label);
            rootPane.setContentPane(contentPane);

            // Step 2: Create a menu bar and set it
            JMenuBar menuBar = new JMenuBar();
            JMenu fileMenu = new JMenu("File");
            JMenuItem openItem = new JMenuItem("Open");
            JMenuItem exitItem = new JMenuItem("Exit");
            fileMenu.add(openItem);
            fileMenu.add(exitItem);
            menuBar.add(fileMenu);
            rootPane.setJMenuBar(menuBar);

            // Make the frame visible and configure it
            frame.setSize(400, 200);
            frame.setDefaultCloseOperation(
                JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        });
    }
}