Java Unicode to UTF unicodeToUTF(String in)

Description

unicode To UTF

License

Open Source License

Declaration

public static String unicodeToUTF(String in) 

Method Source Code

//package com.java2s;
/*// www  . j  a  v a2s  .  c  o  m
 *   
 *
 * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation. 
 * 
 * This program 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
 * General Public License version 2 for more details (a copy is
 * included at /legal/license.txt). 
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA 
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 */

public class Main {
    public static String unicodeToUTF(String in) {
        int n = in.length();
        StringBuffer t = new StringBuffer(3 * n); // conservative sizing.
        int nt = 0;
        for (int i = 0; i < n; i++) {
            char c = in.charAt(i);
            if (c == '\u0000') {
                t.append('\u00c0');
                t.append('\u0080');
                nt += 2;
            } else if (c <= '\u007f') {
                t.append(c);
                nt += 1;
            } else if (c <= '\u07ff') {
                t.append((char) ('\u00c0' | (c >> 6)));
                t.append((char) ('\u0080' | (c & 0x3f)));
                nt += 2;
            } else {
                t.append((char) ('\u00e0' | (c >> 12)));
                t.append((char) ('\u0080' | ((c >> 6) & 0x3f)));
                t.append((char) ('\u0080' | (c & 0x3f)));
                nt += 3;
            }
        }
        if (nt == n)
            return in;
        else
            return t.toString();
    }
}

Related

1. unicodeToUtf8(String theString)