JFrame frame = new JFrame("Example"); JPanel panel = new JPanel(); // Add some components to the panel panel.add(new JLabel("Hello World")); // Add the panel to the frame frame.add(panel); // Make some changes to the panel panel.setBackground(Color.BLUE); // Redraw the panel and its child components panel.repaint();In the above example, we create a JFrame and add a JPanel to it. We then add a JLabel to the panel and make some changes to the panel's background color. Finally, we call the repaint method on the panel to redraw it and all its child components. The Java.awt package library provides the classes and interfaces for the AWT (Abstract Window Toolkit) graphic user interface toolkit.