import javax.swing.JFrame;
import javax.swing.SwingUtilities; 

public class ShutdownBsp { 

    public ShutdownBsp() { 
        Runtime.getRuntime().addShutdownHook(new ShutdownThread());
        JFrame frame = new JFrame("Shutdown Hook");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
        frame.setSize(400, 300); 
        frame.setLocationRelativeTo(null); 
        frame.setVisible(true); 
    } 

    public static void main(String[] args) { 
        SwingUtilities.invokeLater(() -> new ShutdownBsp()); 
    } 
} 

class ShutdownThread extends Thread { 
    public void run() { 
        System.out.println("Programm wird geschlossen."); 
    } 
}