Here you can find the source of expandTree(final JTree tree, final DefaultMutableTreeNode node)
public static void expandTree(final JTree tree, final DefaultMutableTreeNode node)
//package com.java2s; /*/* www .j a v a2 s. c o m*/ * #%L * VisBio application for visualization of multidimensional biological * image data. * %% * Copyright (C) 2002 - 2014 Board of Regents of the University of * Wisconsin-Madison. * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as * published by the Free Software Foundation, either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/gpl-2.0.html>. * #L% */ import java.util.Enumeration; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreePath; public class Main { /** Fully expands the given JTree from the specified node. */ public static void expandTree(final JTree tree, final DefaultMutableTreeNode node) { if (node.isLeaf()) return; tree.expandPath(new TreePath(node.getPath())); final Enumeration e = node.children(); while (e.hasMoreElements()) { expandTree(tree, (DefaultMutableTreeNode) e.nextElement()); } } }