import java.awt.event.*;
import javax.swing.*;

/**
 * Java GUI interactive example
 *
 * This simple example creates a JFrame with a JLabel displaying "Hello, Java
 * GUI!" and a JButton. When you click the button, the label text is updated to
 * "Button Clicked!".
 *
 * @author azmeer
 */
public class W15aGui1 {

    public static void main(String[] args) {
        // Create a frame
        JFrame frame = new JFrame("Simple GUI Example");
        frame.setSize(300, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Create a label
        JLabel label = new JLabel("Hello, Java GUI!");
        frame.add(label);

        // Create a button
        JButton button = new JButton("Click Me!");
        frame.add(button);

        // Add action listener to the button
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                label.setText("Button Clicked!");
            }
        });

        // Set layout manager to null for simplicity
        frame.setLayout(null);

        // Set the positions of label and button
        label.setBounds(20, 30, 200, 30);
        button.setBounds(20, 70, 120, 30);

        // Make the frame visible
        frame.setVisible(true);
    }
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SwingLayoutDemo {

    private JFrame mainFrame;
    private JLabel headerLabel;
    private JLabel statusLabel;
    private JPanel controlPanel;
    private JLabel msglabel;

    public SwingLayoutDemo() {
        prepareGUI();
    }

    public static void main(String[] args) {
        SwingLayoutDemo swingLayoutDemo = new SwingLayoutDemo();
        swingLayoutDemo.showFlowLayoutDemo();
    }

    private void prepareGUI() {
        mainFrame = new JFrame("Java SWING Examples");
        mainFrame.setSize(400, 400);
        mainFrame.setLayout(new GridLayout(3, 1)); //3 rows x 1 column

        headerLabel = new JLabel("headerLabel", JLabel.CENTER);
        statusLabel = new JLabel("statusLabel", JLabel.CENTER);
        statusLabel.setSize(350, 100);

        mainFrame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent) {
                System.exit(0);
            }
        });
        controlPanel = new JPanel();
        controlPanel.setLayout(new FlowLayout());

        mainFrame.add(headerLabel);
        mainFrame.add(controlPanel);
        mainFrame.add(statusLabel);
        mainFrame.setVisible(true);
    }

    private void showFlowLayoutDemo() {
        headerLabel.setText("Layout in action: FlowLayout");

        JPanel panel = new JPanel();
        panel.setBackground(Color.darkGray);
        panel.setSize(200, 200);
        FlowLayout layout = new FlowLayout();
        layout.setHgap(10);
        layout.setVgap(10);

        panel.setLayout(layout);
        panel.add(new JButton("OK"));
        panel.add(new JButton("Cancel"));
        controlPanel.add(panel);
        mainFrame.setVisible(true);
    }
}