welcome.java

package shamitha;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class WelcomeApp {
    public static void main(String[] args) {
        
        JFrame frame = new JFrame("Welcome App");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
        frame.setLayout(new FlowLayout());

        JButton button = new JButton("Click Me");
        
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(frame, "Welcome to the Java GUI Application!", "Welcome", JOptionPane.INFORMATION_MESSAGE);
            }
        });

        frame.add(button);
        
        frame.setVisible(true);
    }
}