Java Native to ASCII native2Ascii(String s)

Description

Converts a string from the Unicode representation into something that can be embedded in a java properties file.

License

Apache License

Parameter

Parameter	Description
s	The string to convert

Return

the ASCII string

Declaration

public static String native2Ascii(String s) 

Method Source Code

//package com.java2s;
/*//from  w  w  w .  j  a v a 2  s . c  om
 * Copyright (c) 2008-2016 Computer Network Information Center (CNIC), Chinese Academy of Sciences.
 * 
 * This file is part of Duckling project.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 *
 */

public class Main {
    /**
     *  Converts a string from the Unicode representation into something that can be
     *  embedded in a java properties file.  All references outside the ASCII range
     *  are replaced with \\uXXXX.
     *
     *  @param s The string to convert
     *  @return the ASCII string
     */
    public static String native2Ascii(String s) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < s.length(); i++) {
            char aChar = s.charAt(i);
            if ((aChar < 0x0020) || (aChar > 0x007e)) {
                sb.append('\\');
                sb.append('u');
                sb.append(toHex((aChar >> 12) & 0xF));
                sb.append(toHex((aChar >> 8) & 0xF));
                sb.append(toHex((aChar >> 4) & 0xF));
                sb.append(toHex(aChar & 0xF));
            } else {
                sb.append(aChar);
            }
        }
        return sb.toString();
    }

    private static char toHex(int nibble) {
        final char[] hexDigit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        return hexDigit[nibble & 0xF];
    }
}

Related

1. native2ascii(String code)
2. native2ascii(String line)
3. native2AscII(String str)
4. nativeToAscii(String input)