Java Unicode Unescape unescapeUnicodeChars(String string)

Description

Unescapes \\uXXXX encoded chars.

License

Open Source License

Declaration

public static String unescapeUnicodeChars(String string) 

Method Source Code

//package com.java2s;
/**// w w w  . j  a v  a2s.  c  o  m
 * This file is part of tapioca.core.
 *
 * tapioca.core 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 3 of the License, or
 * (at your option) any later version.
 *
 * tapioca.core 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 tapioca.core.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Unescapes \\uXXXX encoded chars.
     */
    public static String unescapeUnicodeChars(String string) {
        int pos = string.indexOf("\\u");
        if (pos < 0) {
            return string;
        }
        StringBuilder newString = new StringBuilder();
        int charValue, oldPos = 0;
        while ((pos >= 0) && (pos + 5 < string.length())) {
            newString.append(string.substring(oldPos, pos));
            try {
                charValue = Integer.parseInt(string.substring(pos + 2, pos + 6), 16);
                newString.append(Character.toChars(charValue));
                oldPos = pos + 6;
            } catch (Exception e) {
                // couldn't extract a number --> seems that the \\u is no encoded unicode
                oldPos = pos + 2;
            }
            pos = string.indexOf("\\u", pos + 2);
        }
        return newString.toString();
    }
}

Related

1. unescapeHTMLUnicodeEntity(final String text)
2. unescapeUnicode(String encoded)
3. unescapeUnicode(String s)
4. unescapeUnicode(String s)