Exiting an application gracefully?

Question

I have an application with a well defined Try/Catch/Finally chain that exits and executes the finally block just fine under normal conditions, however when someone premature

Answer 1

With modern Java, Window.dispose() on all application windows can offer more graceful possibility to exit an AWT application than System.exit(0), see
https://docs.oracle.com/javase/8/docs/api/java/awt/Window.html#dispose--

/** Listens and closes AWT windows.
 * The class is implemented as singleton since only one is needed.
 */
public class ExitListener extends WindowAdapter {

  /** the instance object */
  private static final ExitListener INSTANCE = new ExitListener();

  // hide the constructor
  private ExitListener () {}

  /** retrieve the listener object */
  public static ExitListener getInstance () {
    return INSTANCE;
  }

  @Override
  public void windowClosing ( final WindowEvent e ) {
    e.getWindow().dispose();
  }
}

and with your windows

window.addWindowListener( ExitListener.getInstance() );

However, be careful in adverse environments, see:
https://docs.oracle.com/javase/8/docs/api/java/awt/doc-files/AWTThreadIssues.html#Autoshutdown