unescape Unicode - Java java.lang

Java examples for java.lang:String Unicode

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Description

unescape Unicode

Demo Code

/*/*  www  .ja v  a 2s. co  m*/
 * (c) Copyright MIT and contributors 2003-2008. Some rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
import org.apache.log4j.Logger;

public class Main{

    static Logger logger = Logger.getLogger(BibtexUtils.class);
    public static String unescapeUnicode(String s) {
        if (s.indexOf("\\u") < 0) {
            return s;
        }

        StringBuffer sb = new StringBuffer(s.length());
        int l = 0;
        int u = s.indexOf("\\u", l);
        while (u >= 0) {
            sb.append(s.substring(l, u));
            if (u > 0 && s.charAt(u - 1) != '\\') {
                try {
                    sb.append((char) Integer.parseInt(
                            s.substring(u + 2, u + 6), 16));
                    l = u + 6;
                } catch (Exception e) {
                    logger.info(e);
                    sb.append("\\u");
                    l = u + 2;
                }
            } else {
                sb.append("\\u");
                l = u + 2;
            }
            u = s.indexOf("\\u", l);
        }
        sb.append(s.substring(l));

        return sb.toString().replace("\\\\u", "\\u");
    }
}

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