Java tutorial
import java.awt.event.WindowEvent; import java.awt.event.WindowListener; import javax.swing.JFrame; public class Main implements WindowListener { JFrame window = new JFrame("Window State Listener"); public Main() { window.setBounds(30, 30, 300, 300); window.addWindowListener(this); window.setVisible(true); } public static void main(String[] args) { new Main(); } public void windowClosing(WindowEvent e) { System.out.println("Closing"); window.dispose(); System.exit(0); } public void windowOpened(WindowEvent e) { System.out.println("Opened"); } public void windowClosed(WindowEvent e) { System.out.println("Closed"); } public void windowIconified(WindowEvent e) { System.out.println("Iconified"); } public void windowDeiconified(WindowEvent e) { System.out.println("Deiconified"); } public void windowActivated(WindowEvent e) { System.out.println("Activated"); } public void windowDeactivated(WindowEvent e) { System.out.println("Deactivated"); } }