swt_menu_dispose.rb

require 'java'
require 'swt.jar'
class SwtTest
  include_package 'org.eclipse.swt.widgets'
  import 'org.eclipse.swt.SWT'
  def run
    puts "Press Enter to Start"
    #pause, in case you wan to attach a profiler
    gets
    shell = Shell.new(Display.new)
    shell.layout = org.eclipse.swt.layout.FormLayout.new
    #shell.visible = true
    i = 0
    while true
       menu_bar = Menu.new(shell, SWT::DROP_DOWN)
       5.times do
         menu = Menu.new(menu_bar)
         (1..10).each do |j|
           item_1 = MenuItem.new(menu, SWT::CASCADE)
           item_1.text = "Item #{j}" 
         end
         #menu.visible = true
       end
       menu_bar.dispose
       i = i+1
       if (i % 100) == 0
         puts i
         puts "#{menu_bar} <-- sample menu bar"
       end
    end
  end
end

SwtTest.new.run

swt_shell_dispose.rb

require 'java'
require 'swt.jar'
class SwtTest
  include_package 'org.eclipse.swt.widgets'
  import 'org.eclipse.swt.SWT'
  def run
    puts "Press Enter to Start"
    #pause, in case you wan to attach a profiler
    gets
    display = Display.new
    i = 0
    while true
      shell = Shell.new(display)
      shell.layout = org.eclipse.swt.layout.FormLayout.new
      #shell.visible = true
       menu_bar = Menu.new(shell, SWT::DROP_DOWN)
       5.times do
         menu = Menu.new(menu_bar)
         (1..10).each do |j|
           item_1 = MenuItem.new(menu, SWT::CASCADE)
           item_1.text = "Item #{j}" 
         end
         #menu.visible = true
       end
       shell.dispose
       i = i+1
       if (i % 50) == 0
         puts i
         puts "#{shell} <-- sample shell"
       end
    end
  end
end

SwtTest.new.run

SWTMenuDispose.java

import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.SWT;

public class SWTMenuDispose {
	public static void main(String[] args) throws InterruptedException {
		Thread.sleep(5000);
		System.out.println("Starting.");
		Shell shell = new Shell(new Display());
		shell.setLayout(new FormLayout());
		Integer repetition = 0;
		while (true) {
			Menu menuBar = new Menu(shell, SWT.DROP_DOWN);
			for (Integer i = 0; i < 5; i++) {
				Menu menu = new Menu(menuBar);
				for (Integer j = 0; j < 10; j++) {
					MenuItem item = new MenuItem(menu, SWT.CASCADE);
					item.setText(String.format("Item %d", j));
				}
			}
			menuBar.dispose();
			repetition++;
			if (repetition % 100 == 0) {
				System.out.println(repetition);
				System.out.println(menuBar.toString() + " <-- sample menu bar");
			}
		}
		
	}
}