Here you can find the source of upMove(JTree tree)
public static void upMove(JTree tree)
//package com.java2s; /*// w w w.j a v a 2 s . c o m * Copyright (C) 2006-2009 * Woei-Kae Chen <wkc@csie.ntut.edu.tw> * Hung-Shing Chao <s9598007@ntut.edu.tw> * Tung-Hung Tsai <s159020@ntut.edu.tw> * Zhe-Ming Zhang <s2598001@ntut.edu.tw> * Zheng-Wen Shen <zwshen0603@gmail.com> * Jung-Chi Wang <snowwolf725@gmail.com> * * This file is part of GTT (GUI Testing Tool) Software. * * GTT 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. * * GTT 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * GNU GENERAL PUBLIC LICENSE http://www.gnu.org/licenses/gpl */ import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreePath; public class Main { public static void upMove(JTree tree) { DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree .getLastSelectedPathComponent(); if (node == null) return; if (node.isRoot()) return; DefaultMutableTreeNode parent = (DefaultMutableTreeNode) node .getParent(); int index = parent.getIndex(node); if (index <= 0) return; parent.remove(node); parent.insert(node, index - 1); TreePath path = tree.getSelectionPath(); tree.setSelectionPath(path); tree.updateUI(); } }