public void test1() { final ITeeterButton buttonEnter = new TeeterButton(null, null); final ITeeterButton buttonClear = new TeeterButton(null, null); final ITeeterButton buttonExit = new TeeterButton(null, null); final ITeeterPanel panel = new TeeterPanel(); panel.addButton(buttonEnter); panel.addButton(buttonClear); panel.addButton(buttonExit); final ITeeterWindow window = (new BasicWindow.Builder()) .withButtons(panel, buttonEnter, buttonClear, buttonExit) .build(); }