Java tutorial
/* * Copyright (c) 2009, 2010, 2011, 2012, B3log Team * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.b3log.solo.util.comparator; import java.util.Comparator; import java.util.Date; import org.b3log.solo.model.Article; import org.json.JSONObject; /** * Article comparator by create date. * * @author <a href="mailto:DL88250@gmail.com">Liang Ding</a> * @version 1.0.0.1, Dec 30, 2010 */ public final class ArticleCreateDateComparator implements Comparator<JSONObject> { /** * Package default constructor. */ ArticleCreateDateComparator() { } @Override public int compare(final JSONObject article1, final JSONObject article2) { try { final Date date1 = (Date) article1.get(Article.ARTICLE_CREATE_DATE); final Date date2 = (Date) article2.get(Article.ARTICLE_CREATE_DATE); return date2.compareTo(date1); } catch (final Exception e) { throw new IllegalStateException(e); } } }