Java tutorial
//package com.java2s; /* Copyright (C) 2001 - 2010 The Software Conservancy as Trustee. All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Nothing in this notice shall be deemed to grant any rights to trademarks, copyrights, patents, trade secrets or any other intellectual property of the licensor or any contributor except as expressly stated herein. No patent license is granted separate from the Software, for code that you delete from the Software, or for combinations of the Software with other software or hardware. */ import java.util.ArrayList; import java.util.List; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class Main { /** * Return a List of the comments contained by a node. * * @param node * * @return ArrayList of Comment objects. */ private static ArrayList getComments(Node node) { ArrayList commentList = new ArrayList(); getComments(node, commentList); return commentList; } /** * Recursively find the comments within a node, and add them to a supplied (not null) List) * * @param node * Node in which to search for comments * @param commentList * List of comments which it will add to. */ private static void getComments(Node node, List commentList) { // if (commentList==null) throw new IllegalArgumentException ("list may not be null"); if (node != null) { if (Node.COMMENT_NODE == node.getNodeType()) { // Comment - add it commentList.add(node); } else { // Ignore } // Now recursively traverse the tree under this node. NodeList children = node.getChildNodes(); if (children != null) { // Now need to do each child in turn. for (int i = 0; i < children.getLength(); i++) { getComments(children.item(i), commentList); } } } } }