import java.awt.EventQueue;
 
public abstract class Application {
 
    public abstract void startup(String... args) throws Exception;
 
    public static void launch(final Class<? extends Application> appClass, final String... args) {
        try {
            EventQueue.invokeAndWait(new Runnable() {
                public void run() {
                    Application app;
                    try {
                        app = appClass.newInstance();
                        app.startup(args);
                    } catch (Exception e) {}
                }
            });
        } catch (Exception ex) {
            throw new RuntimeException(ex.getCause().getMessage(), ex.getCause());
        }
    }
}

public class SimpleApp extends Application {
 
    @Override
    public void startup(String... args) throws Exception {
        System.out.println(Thread.currentThread().getName()); //prints 'AWT-EventQueue-0'
    }
 
    public static void main(String[] args) {
        launch(SimpleApp.class, args);
    }
}

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
public class Shell2 extends Shell1 {
   public static void main(String args[]) {
      try {
         Display display = Display.getDefault();
         Shell2 shell = new Shell2(display, SWT.SHELL_TRIM);
         shell.open();
         shell.layout();
         while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
               display.sleep();
         }
      } catch (Exception e) {
         e.printStackTrace();
      }
   }
   public Shell2(Display display, int style) {
      super(display, style);
      setText("SWT Application");
      setSize(500, 375);
      final Button button = new Button(this, SWT.NONE);
      button.setText("button");
      button.setBounds(147, 90, 107, 47);
      setCheckBoxText("My Label");
      getHelloButton().setText("World");
      getHelloButton().setLocation(10, 82);
   }
}