Follow along with the video below to see how to install our site as a web app on your home screen.
Anmerkung: This feature currently requires accessing the site using the built-in Safari browser.
Tree tree = tviewer.getTree();
tree.setFocus();
tree.setSelection(new TreeItem[] { tree.getItem(0) });
oder
tree.setSelection(new TreeItem[] { tree.getItems()[0] });