Returns true if the URL represents a path, and false otherwise. : URL « Network « Java Tutorial

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3. URL

import java.io.File;
import java.net.URL;

/* 
 * JCommon : a free general purpose class library for the Java(tm) platform
 * 
 *
 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
 * 
 * Project Info:  http://www.jfree.org/jcommon/index.html
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 * 
 * ------------
 * IOUtils.java
 * ------------
 * (C)opyright 2002-2004, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: IOUtils.java,v 1.8 2009/01/22 08:34:58 taqua Exp $
 *
 * Changes
 * -------
 * 26-Jan-2003 : Initial version
 * 23-Feb-2003 : Documentation
 * 25-Feb-2003 : Fixed Checkstyle issues (DG);
 * 29-Apr-2003 : Moved to jcommon
 * 04-Jan-2004 : Fixed JDK 1.2.2 issues with createRelativeURL;
 *               added support for query strings within these urls (TM);
 */


/**
 * The IOUtils provide some IO related helper methods.
 *
 * @author Thomas Morgner.
 */
public class Main {
  /**
   * Returns <code>true</code> if the URL represents a path, and 
   * <code>false</code> otherwise.
   * 
   * @param baseURL  the URL.
   * 
   * @return A boolean.
   */
  private boolean isPath(final URL baseURL) {
      if (getPath(baseURL).endsWith("/")) {
          return true;
      }
      else if (baseURL.getProtocol().equals("file")) {
          final File f = new File(getPath(baseURL));
          try {
              if (f.isDirectory()) {
                  return true;
              }
          }
          catch (SecurityException se) {
              // ignored ...
          }
      }
      return false;
  }

  /**
   * Implements the JDK 1.3 method URL.getPath(). The path is defined
   * as URL.getFile() minus the (optional) query.
   *
   * @param url the URL
   * @return the path
   */
  private String getPath (final URL url) {
      final String file = url.getFile();
      final int queryIndex = file.indexOf('?');
      if (queryIndex == -1) {
          return file;
      }
      return file.substring(0, queryIndex);
  }
}