stringutils.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 102 行

/* ========================================================================
 * JCommon : a free general purpose class library for the Java(tm) platform
 * ========================================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 * 
 * ----------------
 * StringUtils.java
 * ----------------
 * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: StringUtils.java,v 1.4 2005/06/01 14:12:31 taqua Exp $
 *
 * Changes
 * -------------------------
 * 21.06.2003 : Initial version
 *
 */

package org.jfree.util;

/**
 * String utilities.
 * 
 * @author Thomas Morgner.
 */
public class StringUtils {

    /**
     * Private constructor prevents object creation. 
     */
    private StringUtils() {
    }

    /**
     * Helper functions to query a strings start portion. The comparison is case insensitive.
     *
     * @param base  the base string.
     * @param start  the starting text.
     *
     * @return true, if the string starts with the given starting text.
     */
    public static boolean startsWithIgnoreCase(final String base, final String start) {
        if (base.length() < start.length()) {
            return false;
        }
        return base.regionMatches(true, 0, start, 0, start.length());
    }

    /**
     * Helper functions to query a strings end portion. The comparison is case insensitive.
     *
     * @param base  the base string.
     * @param end  the ending text.
     *
     * @return true, if the string ends with the given ending text.
     */
    public static boolean endsWithIgnoreCase(final String base, final String end) {
        if (base.length() < end.length()) {
            return false;
        }
        return base.regionMatches(true, base.length() - end.length(), end, 0, end.length());
    }

    /**
     * Queries the system properties for the line separator. If access
     * to the System properties is forbidden, the UNIX default is returned.
     *
     * @return the line separator.
     */
    public static String getLineSeparator() {
        try {
            return System.getProperty("line.separator", "\n");
        }
        catch (Exception e) {
            return "\n";
        }
    }


}