Tree () { final Tree tree = new Tree(new DefaultTreeModel(new DefaultMutableTreeNode())); tree.setCellRenderer(getTreeCellRenderer()); tree.setRootVisible(false); tree.setShowsRootHandles(true); tree.addKeyListener(new TreeKeyListener()); tree.addTreeSelectionListener(new MyTreeSelectionListener()); if (!myAllowMultiSelection) { tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION); } new DoubleClickListener() { @Override protected boolean onDoubleClick(@NotNull MouseEvent e) { if (tree.getPathForLocation(e.getX(), e.getY()) != null) { doOKAction(); return true; } return false; } }.installOn(tree); TreeUtil.installActions(tree); return tree; }