ATMMain.java

import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

/**
 * Main class that starts the ATM Simulation application.
 */
public class ATMMain {
    public static void main(String[] args) {
        System.out.println("Hello World! Starting ATM Simulation...");

        // Set system look and feel
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (ClassNotFoundException | InstantiationException |
                 IllegalAccessException | UnsupportedLookAndFeelException e) {
            System.out.println("Error setting look and feel: " + e.getMessage());
        }

        // Launch GUI safely on the Event Dispatch Thread
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                LoginScreen login = new LoginScreen();
                login.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                login.setVisible(true);
            }
        });
    }
}